General Physics

General Physics

1 General Physics 1. 2. 3. 4. 5. 6 7.

Length and Time Speed , velocity and acceleration Mass and weight Density Forces Work, energy and power Pressure

1. Length and Time 1.

What is the vernier reading ? A. 2.23 B. 2.26 C. 2.33 D. 2.36

The diagram shows part of a vernier scale 5.

The width of a wooden block is measured using vernier calipers.

What is the reading on the vernier scale? A. 6.50 cm B. 6.55 cm C. 7.00 cm D. 7.45 cm 2.

A student has been asked to determine , as accurately as possible the volume of a piece of wire. The wire is about 80 cm long and about 0.2 cm in diameter. Which measuring instruments should the student use? Length Diameter A metre rule micrometer B metre rule vernier calipers C micrometer vernier calipers D vernier calipers micrometer

3.

4.

Which instrument internal diameter measurement ? A. manometer C. micrometer

What is the width of the block? A. 3.5 mm B. 5.3 mm C. 8.0 mm D. 8.5 mm 6. The diagram shows a micrometer scale

is used to measure the of a pipe with a single B. measuring cylinder D. vernier calipers Which reading is shown? A. 5.64 mm B. 7.14 mm C. 7.16 mm D. 7.64 mm

The diagram shows a vernier V placed against a scale S

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Namrata David Publications

General Physics 7.

The diagram shows part of a vernier scale

The can rolls over twice. What is the circumference (distance al round) of the can ? A. 13 cm C. 26 cm B. 14 cm D. 28 cm 11. A stop watch is used to time race. The diagrams show the watch at the start and at the end of the race. Which is the correct reading ? A. 30.5 mm B. 33.5 mm C. 38.0 mm D. 42.5 mm 8. The diagram shows one method of measuring the diameter of a beaker. How long did the race take ? A. 45.7 s C. 46.5 s B. 46.0 s D. 47.0 s 12. A piece of cotton is measured between two points on a ruler. What is the diameter of the beaker ? A. 4.5 cm C. 5.5 cm B. 5.0 cm D. 8.0 cm

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In an experiment , a ball is rolled down a curved track that is about half a metre long.

When the length of cotton is wound closely around a pen , it goes round six times.

What is the distance once round the pen? A. 2.2 cm B. 2.6 cm C. 13.2 cm D. 15.6 cm Which measuring device should be used to measure the length accurately ? A. metre rule B. micrometer C. tape measure D. vernier calipers 10. A cylinder can is rolled along the ruler shown in the diagram.

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13. A decorator wishes to calculate the area f a bath room tile so that he can estimate the amount of adhesive that he needs to buy. What must he use ? A. a measuring cylinder only B. a ruler only C. a measuring cylinder and clock only D. a measuring cylinder and a ruler only

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General Physics 14.

The diagram shows a thick- walled tube. The thickness of the wall is 3 mm.

18. A floor is covered with square tiles .The diagram shows a ruler on the tiles.

What is the internal diameter d of the tube ? A. 2.8 cm C. 3.4 cm B. 3.1 cm D. 7.4 cm 15.

The diagram shows a stop watch, originally set at 00:00 When a car was first seen, the stop-start button was pressed. When the car passed the observer , the stop watch showed 01:06.

How long is one tile ? A. 3 cm B. 6 cm

19. The diagram shows the times on stop clock at the beginning and the end of an experiment.

How long did the car take to reach the observer ? A. 1.06 second C. 66 second B. 6 second D. 106 second 16.

17.

How long did the experiment take ? A. 10 s C. 35 s B. 25 s D. 45 s

A girl uses a rule to measure the length of a metal rod. Because the end of the rule is damaged , she places one end of the rod at the 1 cm mark as shown.

How long is the metal rod ? A. 43 cm B. 46 cm C. 53 cm D. 56 cm

C. 9 cm D. 12 cm

2. Speed Velocity and Acceleration 20. An object is falling under gravity with terminal velocity. What is happening to its speed ? A. It is decreasing to a lower value B. It is decreasing to zero C. It is increasing D. It is staying constant 21. Which quantity X is calculated using this equation ?

A ruler is used to measure the length of a nail. A. B. C. D. What is the length of the nail ? A. 1.3 cm C. 5.2 cm B. 2.9 cm D. 8.1 cm

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X= change in velocity Time taken acceleration Average velocity Distance travelled Speed

22. The graph shows the movement of a car over a period of 50 s.

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General Physics 26. Which graph shows the motion of a heavy steel ball falling from a height of 2 m ?

What was the distance traveled by the car while its speed was increasing ? A. 10 m C. 100 m B. 20 m D. 200 m 23. Which graph represents the motion of a body falling vertically that reaches a terminal velocity ? 27.

27.

24. A car takes 1 hr to travel 100 km along a main road and then ½ hr to travel 20 km. along a side road

What is the average speed of the car the whole journey ? A. 60 km/h C. 80 km/h B. 70 km/h D. 100 km/h

for

25. A car is brought to rest in 5 s in a speed of 10 m/s. What is the average deceleration of the car ? C. 15 m/s2 A. 0.5 m/s2 2 D. 50 m/s2 B. 2 m/s

A student drops a table-tennis ball in air. What happens to the velocity and to the acceleration of the ball during the first few seconds after release ? Velocity acceleration A decreases decreases B decreases increases C increases decreases D increases increases

28. What must change when a accelerating ? A. the force acting on the body B. the mass of the body C. the speed of the body D. the velocity of the body

body

is

29. A car driver takes a total of two hours to make a journey of 75 km. She has a coffee break of half an hour and spends a quarter of an hour stationary in traffic jam. At what average speed must she travel during the rest of the time if she wants to complete the journey in the two hours ? A. 38 km/h C. 60 km/h B. 50 km/h D. 75 km/h 30. Which of the following defines acceleration ? A.. Change in velocity. B. change in distance Time taken time taken C. change in speed time taken D. change in distance in a fixed direction Time taken 31. The graph shows the movement of a car over a period of 50 s.

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General Physics What is correct ? Vertical forces A B C D

L=W L>W L=W L>W

Horizontal forces T = R T > R T > R T = R

34. The graph illustrates the motion of an object.

What was the distance traveled by the car during the time when it was moving at a steady speed ? A.. 10 m C. 200 m B. 100 m D. 400 m 32. The diagram shows a parachutist in four positions after she jumps from a high balloon. At which position does she have terminal velocity A. not yet moving C. not accelerating

Which feature of the graph represent the distance traveled by the object while moving at constant speed ? C. area T A. area S B. area S + area T C. the gradient at point X 35. The diagram shows a strip of paper that has been pulled under a vibrating arm by an object moving at constant speed. The arm was vibrating regularly, making 50 dots per second.

B. accelerating D. not moving What was the speed of the object ? A. 2.0 cm/s C. 100 cm/s B. 5.0 cm/s D. 200 cm/s 33. An air craft, flying at a constant height, is gaining speed. The forces acting are L lift due to the wings R air resistance T the thrust due to the engines W the weight

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36. The speed- time graph for a falling skydiver is shown below. The skydiver alters his fall first by spreading his arms and legs and then by using parachute. Which part of the graph shows the diver falling with terminal velocity ?

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General Physics 37. The graph shows how the speed of a car changes with time.

Which of the following gives the distance traveled in time interval OR ? A. the area OPQR B. the length PQ C. the length (QR- PO) D. the ratio QR/PO 38. A snail crosses a garden path 30 cm wide at a speed of 0.2 cm/s.

What is the distance traveled by the object in the first 3 s ? A. 1.5 m C. 3.0 m B. 2.0 m D. 6.0 m 42. A small steel ball is dropped from a low balcony. Ignoring air resistance , which statement describes its motion ? A. it falls with constant acceleration B. it falls with constant speed C. it falls with decreasing acceleration D. it falls with decreasing speed 43. The three balls shown are dropped from a bench.

How long does the snail take ? A. 0.0067s C. 15 s B. 6.0 s D. 150 s 39. The diagram shows a speed time graph for a body moving with constant acceleration .

Which balls have the same acceleration ? A.. aluminium and lead only B. aluminium and wood only C. lead and wood only D. aluminium, lead and wood 44. A car accelerates from traffic lights. The graph shows how the car’s speed changes with time.

What is represented by the shaded area under the graph ? A. Acceleration C. speed B. distance D. time 40. A tunnel has length of 50 km. A car takes 20 min to travel between the two ends of the tunnel. What is the average speed of the car ? A. 2.5 km/h C. 150 km/h B. 16.6 km/h D. 1000 km./h

How far does the car travel before it reaches a steady speed ? A. 10 m B. 20 m C. 100 m D. 200 m

41. The diagram shows a speed time graph for an object moving at constant speed.

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General Physics 45. The graph represents the movement of a body accelerating from rest.

The times taken to travel between one pole and the next are measured.

Which time is the greatest ? A. pole 1 and pole 2 C. pole 3 and pole4 B. pole 2 and pole 3 D. pole 4 and pole 5 After 5 seconds how far has the body moved ? A. 2m C. 25 m B. 10 m D. 50 m

49. A train travels along a track from Aytown to Beetown. The map shows the root.

46. A child is standing on the platform of a station, watching the trains.

A train traveling at 30 m/s takes 3 seconds to pass the child. What is the length of the train ? A. 10 m C. 90 m B. 30 m D. 135 m 47. The graph shows the progress of an athlete in 100 m race.

The distance traveled by the train between the towns is 210 km. It moves at an average speed of 70 km/ h. How long does the journey take ? A.. less than 70/210 hours, because the journey is not in a straight line. B. exactly 70/210 hours C. exactly 210/70 hours D. more than 210/70 hours because the journey is not in a straight line. 50. Which speed/time graph applies to an object at rest ?

What time was taken to travel 10 m from the start ? A. 2.4 s C. 65 s B. 2.8 s D. 70 s 48. Five telegraph poles are positioned at equal distance along the side of a road. A car accelerates until it level with pole 4 . The car then continues along the road at a steady speed.

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General Physics 51. A racing car is fitted with an on-board computer. Every time the car passes the straight line, the computer records the distance traveled in the next two seconds. Which set of data shows that the car is increasing in speed during the 2 seconds ? A. Time/s Distance travelled/m 0 0 1 100 2 200 B Time/s Distance travelled/m 0 0 1 90 2 180 C Time/s Distance travelled/m 0 0 1 80 2 190 D Time/s Distance travelled/m 0 0 1 100 2 180

A. 4.0 s B. 6.0 s 54.

C. 10 s D. 16 s

A cyclist is riding along a road when an animal runs in front of him. The graph shows the cyclist’s motion. He sees the animal at P, starts to brake at Q and stops at R.

What is used to find the distance traveled after he applies the brakes ? A. the area under line PQ B. the area under line QR C. the gradient of line PQ D. the gradient of line QR 55.

A car travels along the route PQRST in 30 minutes.

52. The graph represents part of journey of a car.

A. What distance does the car travel during this part of the journey ? A. 150 m C. 600 m B. 200 m D. 1200 m

56.

53. A man crosses a road 8.0 m wide at a speed of 2.0 m/s.

What is the average speed of the car ? 10 km/hour C. 30 km/hour B. 20 km/hour D. 60 km/hour A tennis player hits a ball hard and 0.4 s later hears an echo from a wall. The speed of sound in air is 330 m/s. How far away is the player from the wall ? A. B. C. D.

66 m 132 m 264 m 825 m

How long does the man take to cross the road?

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General Physics

4. Mass and weight and Density 57. On the Earth, the gravitational field strength is 10 N/kg . On the Moon , the gravitational field strength is 1.6 N/kg. If the object has a weight of 50 N on the Earth , what is its weight on the moon? A. 1.6 N C. 8.0 N B. 5.0 N D. 80 N 57. Ten identical steel balls, each of mass 27 g, are immersed in a measuring cylinder containing 20 cm3 of water. The reading of the water level rises to 50 cm3 What is the density of the steel? A. 0.90 g/ cm3 C. 9.0 g/ cm3 3 B. 8.1 g/ cm D. 13.5 g/ cm3 58. Which relationship defines gravitational field strength ? A. mass x 10 B. mass x weight C. mass/weight D. weight/mass

62.

An object of mass 100 g is immersed in water as shown in the diagram.

59. A measuring cylinder contains some water stands on a scale pan. A solid ball is lowered into the water. The water level rises from the 30 cm3 mark to the 40 cm3 mark. The scale reading increases from 100g to 180 g. What is the density of the material from which the object is made ? C. 1.1 g/ cm3 A. 0.4 g/ cm3 3 D. 2.5 g/ cm3 B. 0.9 g/ cm 63.

A student does an experiment to estimate the density of an irregular –shaped stone. Which items of equipment are needed ? A. a balance and measuring cylinder containing water B. a balance and a ruler C. a ruler and measuring cylinder containing water D. only a measuring cylinder containing water

64.

In a laboratory on Earth, balances show that an object has mass of 2 kg and a weight of 20 N. The same balances and object are taken to the Moon , where the gravitational field strength is less than on the Earth.

What is the density of the material of the ball ? C. 8.0 g/ cm3 A. 2.0 g/ cm3 3 D. 18 g/ cm3 B. 4.5 g/ cm 60. At a point of the surface of the Earth , the gravitational field strength is 9.8 N/kg. Which pair of values for mass and weight correct for an object placed at this point ? Mass/kg Weight/N A 9.8 10 B 10 9.8 C 10s 98 D 98 10 61. Some students measure the masses and volumes of different sized samples of type of wood.

Are the mass and weight of the object the same, or less, than before ?

Which graph shows their result ?

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General Physics

A. B. C. D.

Mass less less same same

weight less same less same

68.

A student is trying to find the density of a stone, but he has mixed up the instruction cards.

65. The diagram shows a material with dimensions 5 cm x 4 cm x 2 cm .It has mass of 100 g.

What is the density of the material ? C. 5.0 g/ cm3 A. 0.40 g/ cm3 3 D. 10 g/ cm3 B. 2.5 g/ cm 66. A box X full of large granite rocks is weighted. An identical box Y full of small granite chippings then weighted.

Which box weigh more and why ? Heavier reason box A X There is more air in box X B X The density of a chipping is less than a rock C Y There is less air in box Y D Y The density of a chipping is greater than a rock 67. An object that has mass of 15 kg on the Earth is taken to the Moon. The gravitational field strength on the Earth is 10 N/kg and on the Moon is 1.6 N/kg. What are the mass and weight of the object on the Moon ? Mass/kg Weight/N A 15 24 B 15 150 C 24 15 D 150 24

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What order should the cards be in ? A. 5  3  6  2  1  4  7 B. 1  5  3  6  2  7  4 C. 5  6  3  2  1  7  4 D. 1  4  5  3  6  2  7

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General Physics 69. Three objects are cut from the same sheet of steel. They are different shapes but they all have the same mass.

Which object has the greatest density ? A. the disc D. the square B. the L shape C. they all have the same density 70. A body of mass 10 kg falling freely in the gravitational field close to the Moon’s surface has an acceleration of 1.6 m/s2 What is the gravitational filed strength on the Moon ? A. 0 N/kg C. 10 N/kg B. 1.6 N/kg D. 16 N/kg

The length QR and width RS of the tank are known. What other distance needs to be measured in order to be able to calculate the volume of the water. A. ST C. TU B. SV D. TV 74. Which statement is correct ? A. Mass a force measured in kilograms. B. Mass is a force measured in newtons C. Weight is a force measured in kilograms D. Weight is a force measured in newtons 75. Which statement about the mass of a falling object is correct ? A. It decreases as the object falls B. It is equal to the weight of the object C. It is measured in newtons D. It stays the same as object falls 76. The weight of four objects, 1 to 4, are compared using a balance.

71. What are the correct units used for mass and weight ? Mass Weight A Kg Kg B Kg N C N Kg D N N 72. A shop keeper places two identical blocks of cheese on the set of scales and notices that their combined mass is 240 g. Each block measures 2.0cm x 5.0 cm x 10.0 cm.

What is the density of the cheese ? C. 1.2 g/ cm3 A. 0.42 g/ cm3 3 D. 2.4 g/ cm3 B. 0.83 g/ cm 73. A glass tank contains some water.

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Which object is the lightest ? A. object 1 C. object 3 B. object 2 D. object 4 77. Which of the following is the unit of density ? C. g/ cm3 A. cm3/ g 2 D. kg/ m2 B. g/ cm 78 .Which statement is correct ? A. The mass of bottle of water at the North pole is different from its mass at the equator B. The mass of bottle of water is measured in newtons C. The weight of bottle of water and its mass are the same thing D. The weight of a bottle of water is one of the forces acting on it. 79. A person measures the length, width and height and mass of a rectangular metal block. Which of these measurements are needed in order to calculate the density of the metal ? A. mass only B. height and mass only C. length, width and height only D. length , width, height and mass 80

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General Physics 80.The masses of a measuring cylinder before and after pouring some liquid into it are shown in the diagram.

What is the mass of the empty bottle ? A. 0.40 kg C. 0.65 kg B. 0.50 kg D. 0.80 kg

What is the density of the liquid ?

100 g/ cm3 120 100 B. g/ cm3 140

A.

180 g/ cm3 120 180 D. g/ cm3 140 C.

84. Each of the solids shown in the diagram has the same mass. Which solid has the greatest density ?

81.A measuring cylinder contains some water. When a stone is put in the water , the level rises.

What is the volume of the stone ? C. 75 cm3 A. 50 cm3 3 D. 125 cm3 B. 70 cm 82. Two stones of different weight fall at the same time from a Table. Air resistance may be ignored. What will happen and why ? A. both stones hit the floor at the same time because the acceleration of free fall is constant B. both stones hit the floor at the same time because they fall at constant speed C. the heavier stone hits the floor first because acceleration increases with weight D. the heavier stone hits the floor first because speed increases with weight 83. The mass of a full bottle of cooking oil is 1.30 kg. When exactly half of the oil has been used , the mass of the bottle plus the remaining oil is 0.90 kg.

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85. Which of the following statements is correct ? A. mass and weight are different names for the same thing B. the mass of an object is different if the object is taken to the Moon C. The weight of the car is one of the forces acting on the car D. The weight of the chocolate bar is measured in kilograms 86. A student tries to find the density of a metal block. First he measures the weight with a force meter (spring balance). Next he measures the sides of the block using rule, in order to calculate the volume of the block. Finally he divides the weight by the volume to find the density. The student has made a mistake. Why does his method not give the density ?

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General Physics A. density is volume divided by weight B. he should have measured the surface area, not the volume C. he should have used the mass in his calculation, not weight D. weight is not measured with force meter

90. A measuring cylinder is used to measure the volume of the liquid ?

87. In an experiment , six identical bags of flour are balance by a 9kg mass.

Two bags of flour are removed. What mass will balance the remaining bags ? A. 3 kg C. 7 kg B. 6 kg D. 9 kg

What is the volume of the liquid ? C. 48 cm3 A. 43 cm3 3 D. 54 cm3 B. 46 cm 91 .In an experiment , five identical bags of rice are balanced by a 10 kg mass.

88. The masses of a measuring cylinder before and after pouring some liquid are shown in the diagram. Two bags of rice are added to the other five. What mass will now balance the bags ? A. 3.5 kg C. 10 kg B. 7.0 kg D. 14 kg

What is the density of the liquid ? A.

B.

217 g/ cm3 52

C.

217 g/ cm3 70

D.

77 g/ cm3 52 77 g/ cm3 70

92. What is the gravitational force that the Earth exerts on an object ? A. the density of the object B. the mass of the object C. the volume of the object D. the weight of the object 93. The same mass of four different liquids is placed in some measuring cylinder.. Which measuring cylinder contains the liquid with the greatest density ?

89. The diagram shows some liquid in a measuring cylinder. What is the density of the liquid ? A. B. C. D.

320 g/ cm3 36 g/ cm3 1.25 g/ cm3 0.8 g/ cm3

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General Physics 94.

A student pours liquid into a measuring cylinder.

A. B. C. D.

Mercury, Mars and Jupiter Mercury, Venus and Mars Mercury, Venus and Jupiter Venus, Mars and Jupiter

97. Some water is poured into four tubes of different cross sectional areas. Which tube contains the largest volume of water ? The student records the volume of the liquid from the scale on the measuring cylinder. He then put the measuring cylinder containing the liquid on a balance and records the mass. What else need to be measured before the density of the liquid can be calculated ? A. the depth of the liquid in the measuring cylinder B. the mass of the empty measuring cylinder C. the temperature of the liquid in the measuring cylinder D. the volume of the empty measuring cylinder 95.

The diagram shows four blocks , each made 3 of glass of density 2.6 g/ cm The top of each 2 block has an area of 1 cm Which block has a mass of 13 g ?

98. A student is trying to find the density of water and of a large, regular shaped sold. What apparatus is needed to find the density of both ? A. balance, clock, ruler B. balance, measuring cylinder, ruler C. balance, measuring cylinder , string D. clock, ruler, string.

96. The table shows the weight of a 10 kg mass on each of 5 planets. Planet Weight of a 10 kg mass/N Mercury 40 Venus 90 Earth 100 Mars 40 Jupiter 250 On which planet would an astronaut have a smaller weight than on Earth ?

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99. A metal drum has a mass of 200 kg when empty and 1000 kg when filled with 1.0 m3 of methylated spirit. What is the density of methylated spirit ? A. 0.0050 Kg/ m3 B. 0.11 Kg/ m3 C. 800 Kg/ m3 D. 1000 Kg/ m3

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General Physics

5. Forces, Work , Energy and Power 100. An extension-load graph is plotted to show the result of increasing the load on a spring. Which point marks the limit of proportionality of the spring ?

104. A boy, who weighs 50 N , runs up a flight of stairs 6.5 m high in 7 seconds. How much power does he develop ?

6.5 W 50  7 50 W B. 7  6.5 A..

7  6.5 W 50 50  6.5 D. W 7 C.

105. Which is the statement of Newton’s third law of motion ? A. Every force causes a reaction B. If there is no resultant force on a body then there is no acceleration C. The force acting on body are always equal and opposite D. To every action there is a equal but opposite reaction 101. A person just supports a mass of 20 kg suspended from a rope.

What is the resultant force acting on the mass ? A. 0 N B. 10 N C. 20 N D. 200 N 102. A driver’s foot presses with a steady force of 20 N on a pedal in a car shown ?

106. A car is traveling at a constant speed along a road and drives over a large patch of oil. The driver applies the brakes to stop the car. Compared to braking on a dry road , what may happen ? A. The car slowdown more quickly because of greater friction between the tyres and the road B. The car speeds up at first because of the reduced friction between the tyres and the road C. The car takes longer to slow down because of the reduced friction between the tyres and the road D. The car takes longer to slow down because the thinking distance of driver is greater 107. A horizontal pole is attached to the side of a building. There is pivot P at the wall and a chain is connected from the end of the pole to a point higher up the wall.

What is the force F pulling on the piston ? A. 2.5 N B. 10 N C. 100 N D. 160 N 103. Which of the following groups of physical quantities consists only of scalars ? A. acceleration, force, velocity B. acceleration, mass, speed C. force, time, velocity D. mass, speed, time

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There is a tension force F in the chain. What is the moment of the force F about the pivot P ? C. F  l A. F  d D. F  s B. F  h

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General Physics

108. A spring balance is calibrated to give readings in Newton. The graph shows how the length of the spring varies with the load.

What is the value of F ? A.75 N B.150 N C. 225 N

D. 300N

111. The diagrams show cross section of different glasses. A load causes he spring of the balance to extend by 3 cm. What is the balance reading ? A. 3 N B. 5N C. 10 N D. 15 N

109. Force of 3 N and 5 N are acting as shown in the diagram

Which one is the least stable when filled with a liquid ? 112. The table shows how the extension of a spring varies with load.

Between which two loads would you find the limit of proportionality ? A. 0 N and 2 N C. 10 N and 12 N B. 8 N and 10 N D. 14 N and 16 N

Which diagram may be used to find the resultant R of these two forces ?

113. Which is the correct statement about force and velocity ? A. force and velocity are both scalars B. force and velocity are both vectors C. force is a scalar and velocity is a vector D. force is a vector and velocity is a scalar 114. Forces X and Y acts on a block shown on the scale diagram

In which direction is the resultant acting ?

110.The diagram shows a wheelbarrow and its load , which have a total weight of 150 N. This is supported by a vertical force F at the ends of the handles.

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General Physics 115. The diagram shows an aeroplane turning in a horizontal circle at constant speed. In which direction is there a resultant force ?

120. A metal wire initially 1.000m long, extends by 4 mm when a load of 2 N is added to it. What will the length of the wire be if a further 3 N is added, assuming it does not extend beyond its limit of proportionality ? A. 1.060 m C. 1.010 m B. 1.080 m D. 1.020 m 121. Forces are applied to a uniform beam pivoted at its center. Which beam is balance ?

116. The inertia of a body is its resistance to changes its motion. Which property is a measure of body’s inertia ? A. its density B. its mass C. the height of its sides D. the size of its base 117. If a nut and bolt are difficult to undo , it may be easier to turn the nut by using longer spanner. This is because the longer spanner gives A. a larger turning moment B. a smaller turning moment C. less friction D. more friction 118. Some containers are made from thin glass Which empty container is the most stable ? A B C D

119. The propeller on a boat pushes water backwards with a force of 2000 N. The boat moves through the water against a total resistive force of 1800 N.

122. When a block of wood of mass 2 Kg is pushed along the horizontal flat surface of a bench, the friction force measured is 4 N. When the block is pushed along the same bench with a force of 10 N, it moves with a constant A. constant speed of 3m/s B. speed of 5 m/s C. acceleration of 5 m/s D. acceleration of 3 m/s

According to the Newton’s third law , what is the forward force on the propeller due to the water ? A. 3800 N C. 1800 N B. 2000 N D. 200 N

123. When two forces are combined , the size of the resultant depends on the angle between the two forces . Which of the following can not be the magnitude of the resultant when force of magnitude 3 N and 4 N are combined ? A. 1 N B. 3 N C. 7 N D. 8 N

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General Physics 124. A steel spring is stretched by a load. The load is increased. At first the extension is proportional to the load. The spring reaches its limit of proportionality at L. Which is the correct graph of extension against the load for the spring ? 128. A particle P is moving in a horizontal circle about O. It moves at constant speed V.

125. The diagram shows a cyclist leaning over in order to cycle around a corner. Which force is necessary to maintain the motion around the corner ?

Which statement is true ? A. A force of constant size is acting in the direction of V B. A force of constant size is acting towards O C. The force of P varies in size as it moves around the circle D. There are no forces acting on P 129. The wheel of a moving car is driven by the engine. The car is accelerating in the direction shown. In which direction does the frictional force act on the wheel ?

A.

126. Which property of a body cannot be changed if a force is applied to it ? A. its mass C. its size B. its shape D. its velocity 127. Which diagram correctly addition of a 4N and 3N force ?

shows

A stone is weighted using a Newton 130. meter(spring balance) and a pair of scales(pan balance).

the

This experiment is repeated on the Moon.

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General Physics Are the readings for each balance the same or different when taken on Earth and the Moon ? Reading on Reading on Newton meter scales A Different Different B Different Same C Same Different D same same

What is the extension of each spring ? A. 4 cm C. 8 cm B. 6 cm D. 12 cm 134. A body P moves in a circle around a point S . A force F keeps it moving in the circle.

131. Four blocks , each made from a different material , are placed on scales and balanced as shown in the diagrams below. In which diagram does the block have the greatest density ? What happens if the force suddenly disappears ? A. P moves directly towards S B. P moves in a circle closer to S C. P moves away from S in a curved path D. P goes off in a straight line 135. Two forces act at right angles at point O as shown.

132. A load is to be moved using a wheel barrow. The total mass of the load and wheelbarrow is 60 Kg. The gravitational field strength is 10 N/Kg.

What is the resultant of the forces ? Magnitude Direction A 15N OQ B 15N PR C 21N OQ D 21N PR 136. Which part of the graph shows the limit of proportionality of for an elastic solid ?

What is the size of force F needed just to lift the loaded wheelbarrow ? A. 350 N C. 600 N B. 430 N D. 840 N 133. A spring extends by 4 cm when 10 N is suspended from it. Two of these springs are used as shown to carry a 30 N load.

IGCSE Physics

A. B. C. D.

19

O OP P PQ


General Physics 137. When a body moves across a rough surface , a frictional force is produce.

140. A body of mass 10 kg falling freely in the gravitational field close to the Moon’s surface has an acceleration of 1.6 m/ s2 What is the gravitational field strength of the Moon ? A. 0 N/Kg C. 10 N/Kg B. 1.6 N/Kg D. 16 N/Kg

Which statement about this force is always true ? A. it acts in the direction of the motion B. it is equal in value to the force producing the motion C. it makes the body recoil in the opposite direction after stopping it D. it opposes the motion across the surface

141. A spring balance is calibrated to give readings in newtons. The graph shows below how the length of the spring varies with the load ?

138. A car moves in a circle at a constant speed. What is the direction of the resultant force acting on the car ?

A load causes the spring of the balance to extend by 3 cm. What is the balance reading ? A. 3 N B. 10 N C. 10N D. 15 N Two objects X and Y are placed on a 142. beam as shown. The beam balances on a pivot at its centre.

139. The diagram shows a boy of weight 500 N sitting on a see-saw. He sits 2.0 m from the pivot. What does this show about X and Y ? A. They have the same mass and density B. They have the same mass and weight C. They have the same volume and density D. They have the same volume and weight What is the force F needed to balance the see-saw ? A. 250 N C. 1000 N B. 750 N D. 3000 N

IGCSE Physics

same same same same

143. The table shows the length of a wire as the load on it is increased.

20


General Physics Which line in the table shows the correct order of the children’s weight ?

Which subtraction should be made to find the extension caused by the 20 N load ? A. 54.1 cm -0 cm B. 54.1 cm- 50.0 cm C. 54.1 cm- 52.1 cm D. 56.3 cm-54.1 cm 144. A child tries to push over a large empty oil drum . Where should the drum be pushed to topple it over with least force ?

147. What apparatus is needed to determine the density of a regular shaped block ? A. a balance and a ruler B. a balance and a force meter(spring balance) C. a measuring cylinder and a ruler D. a measuring cylinder and a beaker 148. A spring is suspended from a stand. Loads are added and extensions are measured.

145. A ball is released from rest and rolls down a track from the position shown. What is the farthest position the ball could reach ?

Which graph shows the result of plotting extension against load ?

146. Three children X ,Y and Z , are using a see-saw to compare their weights.

149. What is the source of energy converted by a hydro-electric power station ? A. Hot rocks B. Falling water C. Oil D. Waves

IGCSE Physics

21


General Physics 150. A student uses a stand and clamp to hold a flask of liquid. Which diagram shows the most stable arrangement ?

154. An experiment is carried out to measure the extension of a rubber band for different loads. The results are shown below.

Which figure is missing from the table ? A. 16.5 B. 17.3 C. 17.4 D. 18.3

The diagram shows a man diving into the 155. water. 151. A labourer on a building site lifts heavy concrete blocks onto a lorry. Lighter blocks are now lifted the same distance in the same time. What happens to the work done in lifting each block and the power exerted by the labourer.

Which form of energy is increasing as he falls? A. Chemical C. kinetic B. Gravitational D. strain 152. The weights of four objects , 1 to 4, are compared using a balnce.

156. A girl and a boy are pulling in opposite directions on a rope. The forces acting on the rope are shown in the diagram.

Which single force has the same effect as the two force shown ? A. 50 N acting towards the girl B. 350 N acting towards the girl C. 50 N acting towards the boy D. 350 N acting towards the boy

Which object is the lightest ? A. object 1 C. object 3 B. object 2 D. object 4 153. A piece of card has its center of mass at M. Which diagram shows how it hangs when suspended by a thread ?

IGCSE Physics

157. What is designed to change electrical energy into kinetic energy ? A. capacitor B. generator C. motor D. transformer

22


General Physics 158. Objects with different masses are hung on a 10 cm spring . The diagrams shows how much the spring stretches.

Four masses(in total) are placed on the pans, with one or more on pan X, and the rest on pan Y. Which combination of masses can be used to balance the pans ? A. 1g 1g 5g 10 g B. 1 g 2 g 2g 5g C. 2g 5 g 5g 10 g D. 2g 5g 10g 10g 162. Two forces act on a object. In which situation it is impossible for the object to be in equilibrium ? A. the two forces act in the same direction B. the two forces act through the same point C. the two forces are of the same type D. the two forces are the same size

The extension of the spring is directly proportional to the mass hung on it. What is the mass of the object M ? A. 110g B. 150 g c. 200g D. 300 g

163. The diagram shows four models of buses placed on different ramps.

159. A power station uses nuclear fission to obtain energy. In this process , nuclear energy first changed into A. chemical energy B. electrical energy C. gravitational energy D. internal energy 160. Below are four statements s about the effect of forces on objects. Three of the statements are correct. Which statement is incorrect ? A. A force can change the length of an object B. A force can change the mass of an object C. A force can change the shape of an object D. A force can change the speed of an object 161. A simple balance has two pans suspended from the ends of arms of equal lengths. When it is balanced the pointer is at zero.

IGCSE Physics

How many of these models will fall over ? A. 1 B. 2 C. 3 D. 4 164. Which form of energy do we receive directly from sun ? A. Chemical C. nuclear B. Light D. sound 165. A labourer on a building site lifts heavy concrete blocks onto a lorry. Lighter blocks are now lifted the same distance in the same time. Which one of the following is true ? Work done in lifting Power exerted by the block the labourer A Less for the light Less for the light block block B Less for the light The same for block both blocks C More for the light More for the light block block D The same for both More for the light blocks block

23


General Physics 166. The diagram shows bird in flight. In which direction does the weight of the bird act ?

171. In which of these situations is no resultant force needed ? A. a car changing direction B. a car moving in a straight line C. a car slowing down D. a car speeding up 172. The diagram shows sections of four objects ,all of equal masses. The position of the center of mass of each object has been marked with a cross. Which object is more stable ?

167. A force acting on a moving rubber ball. How many of the following could happen to the ball because of the force ?  A change in direction  A change in shape  A change in mass  A change in speed A. 1 B. 2 C. 3 D. 4

173. A car accelerates along a road as it rises uphill.

168. A light aircraft stands at rest on the ground. It stands on three wheels, one at the front and two further back. Which point could be its center of mass ? Which energy changes are taking place ? Energy of motion (kinetic energy)

169. Which form of energy is used to generate electrical energy in a tilde power station ? A. chemical energy B. gravitational energy C. internal energy(thermal energy) D. nuclear energy 170. Which line in the table gives an example of stated form of energy ? A

Form of energy Gravitational

B

Internal

C

Kinetic

D

strain

IGCSE Physics

example The energy due to the movement of a train The energy due to the flow of cathode rays in a cathode ray tube The energy due to the position of a swimmer standing on a high diving board The energy due to the compression of springs in car seat

A

decreasing

Energy of position (gravitational kinetic energy) decreasing

B

decreasing

increasing

C

increasing

Decreasing

D

Increasing

Increasing

174. In a car engine, energy stored in the fuel is converted into thermal energy(heat energy) and energy of motion(kinetic energy). In which form is the energy stored in the fuel ? A. chemical B. geothermal C. hydroelectric D. nuclear 175. A beam is pivoted at its centre. Two masses are suspended at equal distances from the pivot as shown in the diagram.

24


General Physics Which statement is correct ? A. If X has a mass of exactly 2 Kg, it will rise B. If X has a mass of less than 2 Kg , it will fall C. If X has a mass of more than 2 Kg, it will fall D. If X has a mass of more than 2 Kg,it will rise 175. The table below shows the length of a wire as the load on it is increased. Load/N 0 10 20 30 Length/cm 50.0 52.1 54.1 56.3 Which graph correctly shows the extension of the wire plotted against load ?

176. A large electric motor is used to lift a container off a ship. Which of the following values are enough to allow the power of the motor to be calculated? A. the mass of the container and the distance moved B. the force used and distance moved C. the current used and the work done D. the work done and the time taken 177. A tidal power station is made by building a barrage across the mouth of a river. At high tide the sea water is trapped behind the barrage.

At low tide the water is allowed to flow back into the sea through a turbine. What is the useful energy change in a tidal power station ? A. Electrical energy  energy of position(potential) B. Electrical energy  energy of motion (kinetic) C. Energy of motion  energy of position ( potential) D. Energy of position  electrical energy 178. A spring is stretched by hanging a piece of metal from it. What is the name given to the force that stretches the spring ? A. friction B. mass C. pressure D. weight 179. A student carries out an experiment to plot an extension /load graph for a spring. The diagrams show the apparatus at the start of the experiment and with a load added.

IGCSE Physics

25


General Physics A. the force of the pin is larger on the finger than on the thumb. B. The force of the pin is larger on the thumb than on the finger C. The pressure of the pin is larger on the finger than on the thumb D. The pressure on the pin is larger on the thumb than ion the finger

What is the extension caused by the load ? A. x B. y C. y + x D. y - x 180. Three horizontal forces act on a car that is moving along a straight , level road.

Which combination of forces would result in the car moving at constant speed ?

183. A child pushes a toy car along a level floor and then lets it go. As the cars slows down, what is the main energy change ? A. from chemical to heat B. from chemical to kinetic C. from kinetic to gravitational D. from kinetic to heat 184. The diagram shows a flat metal plat that may be hung from a nail so that it can rotate about any of four holes.

181. The diagram shows a cyclist riding along a hilly road. At which position does the cyclist have the least gravitational (potential) energy ?

What is the smallest number of holes from which the flat metal plate should be hung in order to find its center of gravity ? A. 1 B. 2 C. 3 D. 4 185. Two equal forces F act on each of four planks. Which plank turns ?

182. A pin is squeezed between finger and thumb.

Which statement is correct ? IGCSE Physics

186. Which type of power station does not use steam from boiling water to generate electricity ? A. geothermal B. hydroelectric C. nuclear D. oil-fired

26


General Physics 187. A man standing at the top of the cliff throws a stone.

191. The diagram shows the sections of four objects of equal mass. The position of the center of mass of each object has been marked with a cross. Which object is the more stable ?

Which form of energy does the stone have at X and at Y ?

A cyclist travels down a hill from rest at 192. point X without pedalling. The cyclist applies his brakes and the cycle stops at point Y.

188. Four blocks, each weighing 10 N, rest on horizontal table. Which block applies the greatest pressure on the table ?

189. A heavy beam is resting on two supports, so that there are three forces acting on it.

The beam is in equilibrium. Which statement is correct ? A. All the forces are equal in value. B. The forces are in one direction and their turning effects are in the opposite direction C. The resultant force is zero and the resultant turning effect is zero D. The total upward force is twice the total downward force

Which energy changes have taken place between X and Y ? A. kinetic  internal(heat)  gravitational potential B. kinetic  gravitational potential  internal(heat) C. gravitational potential  internal(heat)  kinetic D. gravitational potential  kinetic  internal(heat) 193. An empty glass is placed on a join between two tables as shown. The glass remains stable. Which point is center of mass of the glass ?

194. An aeroplane is in equilibrium. The diagram shows the force acting on the aeroplane

190. Which sources of energy uses the production of steam to generate electricity ? A. hydro electric B. nuclear C. tides D. waves

IGCSE Physics

27


General Physics What has the chemical has been converted to when she is at the top of the stairs. A. kinetic energy and gravitational energy B. kinetic energy and strain energy C. gravitational energy and heat energy D. strain energy and heat energy

Lift force from wings

196. Electrical energy may obtained from nuclear fission In what does is the energy transferred in this position ? A. Nuclear fuel  generator  reactor and boiler  turbines B. Nuclear fuel  generator  turbines  reactor and boiler C. Nuclear fuel  reactor and boiler  generator  turbines D. Nuclear fuel  reactor and boiler  turbines generator

weight Which statement about the forces is correct ? A B C D

Force from engine Equal to air resistance Equal to air resistance Greater than air resistance Greater than air resistance

Lift force from wings Equal to weight Greater than weight Equal to weight Greater than weight

195. A student adds loads to the elastic cord. He measures the length of the cord for each load . He then plots a graph from the results.

197. Which energy changes take place when a pedalling cyclist uses a generator(dynamo) to light his bicycle lamp ? A. chemical  kinetic  electrical  light B. electrical  chemical  kinetic  light C. kinetic  chemical  lightelectrical D. light  electrical kinetic  chemical 198. Which represents the main energy changes that takes place in a coal-fired power station ? A. Chemical  heat kinetic  electrical B. Chemical  heat  light  electrical C. Chemical kinetic  electricalpotential D. kineticheatlightelectrical

Which length is plotted on the vertical axis ? A. measured length B. original length C. (measured length – original length ) D. (measured length + original length )

199. A car is driven along a level road. The total energy input from the petrol is 60 KJ, and the car wastes 45 KJ of energy.

195. A person uses chemical energy to run up some stairs What is the efficiency of the car ? A. 15% B. 25% C. 45 % D.75%

. She stops at the top of the stairs.

IGCSE Physics

200. When a nucleus of Uranium-235 absorbs a neutron ,nuclear fission occurs. In a typical reaction the total mass decreases by 3  10-28 Kg. Given that the speed of the light c is 3  10 8 m/s approximately how much energy is released ? C. 3  10-11 J A. 9  10-20 J -13 D. 3  10-6 J B. 2  10 J

28


General Physics B. The water exerts the greatest pressure on the base of vessel S. C. The water exerts the same force on base of the each vessel D. The water exerts the same pressure on base of the each vessel

201. The diagram shows a curved curtain rail that has a steel ball rolling on it. The ball is releases at point A. At which point does the ball have maximum kinetic energy ?

206. The diagram shows a battery –operated motor lifting a block of wood at constant speed. 201. The speed of the light is 3  10 8 m/s. What is the energy equivalent of 2kg of matter ? A. 2  3  10 8 J B. 2000  3  10 8 J

1  2  (3  10 8 )2J 2 D. 2  (3  10 8 )2J C.

202. In a hydroelectric power station , water from a reservoir falls down a long pipe before entering the turbines. The turbines then turn the generator. What is the overall energy conversion ? A. electrical energy into kinetic energy. B. Electrical energy into potential energy C. Kinetic energy into chemical energy D. Potential energy into electrical energy 203. Which statement about fission or fusion is correct A. During fission, hydrogen converts into helium and releases energy B. During fission, uranium converts into daughter products and releases energy C. During fusion , helium converts into hydrogen and releases energy D. During fusion , uranium converts into daughter products and releases energy 204. The input power to a motor is 300 W. In 20s it lifts a load of 400 N through a height of 6.0m. What is the efficiency of the motor ? A. 12 % B. 25% C. 40% D. 75%

What is the overall energy change taking place ? A. chemical to gravitational potential B. gravitational potential to electrical C. gravitational potential to kinetic D. kinetic to gravitational potential 207. Four students exercise in gym. Which student does the most work ?

A B C D

Exercise time/s 50 100 200 250

Power developed/ W 250 150 200 30

208. One oscillation of a swinging pendulum occurs when the bob moves from X to Y and back to X again.

205. The diagram show, to the same scale the vertical sections of a set of circular vessels. Each vessel contains the same depth of water.

Which of the following statements is correct ? A. The water exerts the greatest pressure on the base of vessel P.

IGCSE Physics

Using a stop watch, which would be the most accurate way to measure the time for one oscillation of the pendulum ? A. time 20 oscillations and multiply by 20 B. time 20 oscillations and divide by 20 C. time one oscillation D. time the motion from X to Y, and double it.

29


General Physics

209. Which formula gives the efficiency of an energy conversion ? A. Efficiency = total energy input – useful energy output B. Efficiency = total energy input  useful energy output C. Efficiency = useful energy output Total energy input D Efficiency = Total energy input useful energy output

A. input energy = useful output energy B. useful output energy = input energy + wasted energy C. wasted energy = input energy + useful output energy D. wasted energy = useful output energy 213. When a 300 N force is applied to a box weighing 600 N , the box moves 3 m horizontally in 20 s.

210. A girl uses paper clips to balance a toy bird on her finger as shown. What is the average power ? A. 45 W B. 90W C. 900W

D. 1800W

214. A tractor is being used in rough ground. What is the safest position for its center of mass ?

What is the effect of the paper clips ? A. they help to raise the center of mass above her finger B. they help to raise the center of mass above her finger C. they help to lower the centre of mass below her finger D. they do not effect the center of mass but increase the weight 211. Hydro electric, tidal and fossil fuel are three sources of energy. Which of these are renewable energy sources A B C D

Hydroelectric no no yes yes

Tidal yes no no yes

Fossil Yes Yes no no

215. A plane lamina is freely suspended from a point P. The weight of lamina is 2.0 N and the center of mass is at C. PC = 0.50 m PQ = 0.40 m QC = 0.30 m

212. The diagram shows the energy transfer through a machine.

The lamina is displaced to the position as shown. What is the moment that will cause te lamina to swing ? A. 0.60 Nm clockwise B. 0.80 Nm anti clockwise C. 1.0 Nm clockwise D. 1.0 Nm anticlockwise

The machine is 50% efficient. What is correct ?

IGCSE Physics

30


General Physics 216. Two forces act at right angles at a point O as shown.

219. A young child holds a ball over the edge of a balcony. The ball has gravitational potential energy. The ball is then released. It falls on to the concrete path below and bounces back up.

What is the resultant of the forces ?

217. A mass hangs on a string fixed at point P. It starts from position 1 and swings to the farthest position on the opposite side, position 2. It then oscillates several times with decreasing amplitude before ending at position 3.

Which sequence represents , in the correct order , the transformations of the gravitational potential energy after the ball is released ? A.  elastic potential energy  kinetic energy  chemical potential energy B.  elastic potential energy  kinetic energy  gravitational potential energy C.  kinetic energy  elastic potential energy  kinetic energy D.  kinetic energy gravitational potential energy kinetic energy

220. A 2Kg mass is moving with constant speed. The kinetic energy of the mass is 400 J. What is the speed of the mass ? A. 0.4 m/s C. 200 m/s B. 20 m/s D. 400 m/s Where energy ? A. B. C. D.

does the ball have most kinetic at position 1 at position 2 the first time at position 3 the last time at position 3

221. A crane moves its load diagonally , as shown. By what distance is the weight of the load multiplied in order to calculate the increase in gravitational potential energy of the load ?

218. How much energy would be released if 1  10 -20 kg of matter was entirely converted into energy. The speed of light is 3  10 8 m/s. A. 3  10 -12 J B. 9  10 -7 J C. 4.5  10 -4 J. D. 9  10 -4 J.

IGCSE Physics

31


General Physics 222. The efficiency of an electrical generator is 65 %. Which useful output can be expected if the energy input to the generator is 12 KJ? A. 4.2 KJ C. 19 KJ B. 7.8 KJ D. 780 KJ

225. A water manometer is connected to a gas supply. The diagram shows the water level.

6. Pressure 223. Four different liquids are poured into identical measuring cylinders. The diagram shows the depth of the liquids and their densities.

The water is replaced by mercury , which is more dense than water. Which diagram shows the mercury levels when the manometer is connected to the same gas supply ?

224. The diagram show a simple mercury barometer. Which diagram shows the distance to be measured to find atmospheric pressure ?

226.

The system shows in the diagram contains a liquid.

A downward force of 80 N is exerted on the piston K. What will be the upward force exerted by the liquid on piston L ? A. 1N C. 80 N B. 4 N D. 1600N

IGCSE Physics

32


General Physics 227. A girl of weight 500 N runs up a flight of stairs in 10 seconds. The vertical height of the stairs is 5 m.

What is the average power developed by the girl ? A. 50 W C. 250 W B. 100 W D. 100 W 228. A brick of weight 80 N stands upright on the ground as shown.

What is the pressure it exerts on the ground ?

80 N/cm2 20  10 20  10 N/cm2 B. 80 80 N/cm2 C. 10  5 10  5 N/cm2 D. 80

230. A manometer is connected to a gas supply.

Pressure can be measured in cm of water. What is the pressure of the gas ? A. 8 cm of water more than atmospheric pressure B. 12 cm of water more than atmospheric pressure C. 8 cm of water less than atmospheric pressure D. 12 cm of water less than atmospheric pressure 231.Diagram 1 shows some air trapped in a cylinder. Diagram 2 shows the same air after the piston has been pushed in slowly. The air in the diagram 1 is atmospheric pressure PA.

A.

229. Which would be the least likely to sink into soft ground? A. a loaded lorry with four wheels B. a loaded lorry with six wheels C. an empty lorry with four wheels D. an empty lorry with six wheels What is the pressure of the air in diagram 2 ? A.

6  PA. 10

B. PA.

IGCSE Physics

33

10  PA. 6 D. 60  PA.

C.


General Physics 232. The diagram show, to the same scale , the vertical sections of a set of circular vessels, each containing the same depth of water.

Which one of the following statements are correct ? A. The water exerts the greatest pressure on the base of vessel P B. The water exerts the greatest pressure on the base of vessel S C. The water exerts the same force on the base of each vessel D. The water exerts the same pressure on the base of each vessel 233. Which graph show the relationship between the pressure and volume of a fixed mass of gas at constant temperature.

Pressure can be measured in cm of water. What is the pressure of the gas ? E. 8 cm of water more than atmospheric pressure F. 12 cm of water more than atmospheric pressure G. 8 cm of water less than atmospheric pressure H. 12 cm of water less than atmospheric pressure 237. A gas trapped in a cylinder by a movable piston. The length of the gas column is 50 cm and the pressure inside the cylinder is p.

The piston is pushed in a distance of 30 cm, so that the length of the gas column is now 20 cm. The temperature of the gas does not change. What is the new pressure of the gas ? A. 0.4 p C. 1.5 p B. 0.6 p D. 2.5 p 234. A man weighs 600 N . He runs up stairs of total height 4 metres in 3 seconds. How much power is exerted by the man ? A. 450W C. 2400W B. 800 W D. 7200 W 235. Which of the following does not effect the pressure beneath the surface of a liquid ? A. area of the liquid surface B. density of the liquid C. depth of the liquid D. strength of the gravitational field 236. A manometer is connected to a gas supply.

IGCSE Physics

238. If a nut and bolt are difficult to undo , it may be easier to turn the nut by using a longer spanner. This is because the longer spanner gives A. a large turning moment B. a small turning moment C. less friction D. more friction

239. A small table weighing 40 N stands on 2 four legs, each having an area of 0.001 m . What is the pressure of the table on the floor. A. 400 N/ m2 B. 1000 N/ m2 C. 10 000 N/ m2 D. 40 000 N/ m

34


General Physics

240.

Some containers are made from thin glass. Which empty container is more stable ?

243.A boy who weighs 50 N , runs up a flight of stairs 6.5 m high in 7 seconds. How much power does he develop ?

6.5 W 50  7 7  6.5 B. W 50 50 W C. 7  6.5 50  6.5 D. 7 A.

241. The diagram shows a glass block resting on a table top.

244.The diagram shows a simple mercury barometer. Which height is the measure of the atmospheric pressure ? The area of the block in contact with the table is X and the area of the table top is Y. The weight of the block is P and the weight of the table is Q. Which expression gives the pressure exerted on the table by the clock ? A.

P X

B.

P Y

C.

Q X

D.

Q Y

242.The diagram shows the levels X and Y in a liquid manometer when the gas tap is opened.

245.Bubbles of gas, escaping from the mud at the bottom of a deep lack , rise to the surface.

As the bubbles rise they get larger. Why is this ? A. Atmospheric on the bubbles increases B. Atmospheric on the bubbles decreases C. Water pressure on the bubbles decreases D. Water pressure on the bubbles increases

What is the pressure of the gas in the cylinder ? A. 18 cm of the liquid below atmospheric pressure B. 9 cm of the liquid below atmospheric pressure C. 9 cm cm of the liquid above atmospheric pressure D. 18 cm of the liquid above atmospheric pressure

IGCSE Physics

246. Two sharp nails and two blunt nails are held on a piece of wood. Each nail is hit with a same hemmer with the same amount of force. When it is hit , which nail causes the greatest pressure on the wood ?

35


General Physics 249. The diagram shows two divers swimming in the sea and two divers I the fresh water . On which diver is there the greatest pressure ?

247. The diagram shows a manometer connected to a container of carbon dioxide.

250. The diagram shows water.

Which statement correctly describes the pressure exerted by the carbon dioxide ? A. it is equal to the atmospheric pressure B. It is equal to 5 cm of mercury C. It is equal to 5 cm of mercury above atmospheric pressure D. It is equal to 5 cm of mercury below atmospheric pressure 248.The diagram shows the instrument used to measure gas pressure

a man diving into

Which form of energy is increasing as he falls ? A. chemical B. gravitational C. kinetic D. strain 251. A boy and a girl run up a hill in the same time.

What is the instrument called ? A. ammeter B. barometer C. manometer D. thermometer The boy weighs more than the girl.

IGCSE Physics

36


General Physics Which statement is true about the power produced ? A. The boy produces more power B. The girl produces more power C. They both produces the same power D. It is impossible to tell who produced more power 252. The diagram shows a simple mercury barometer. The barometer reading is h cm of mercury.

What happens to the pressure and to the volume of the trapped air as the pump handle is pushed in ?

255. A water manometer is used to measure the pressure of a gas supply to a house .It gives a reading of H cm of mercury.

3 What is pressure at S ? A. approximately zero B. atmospheric pressure C. atmospheric pressure + h cm of mercury. D. h cm of mercury. Why is it better used to water rather than mercury ? A. h would be too large if mercury were used B. h would be too small if mercury were used C. the tube would need to be narrower if mercury were used D. the tube would need to be wider if mercury were used

253 Two boys X and Y each have the same total weight and are standing on the soft ground.

Which boy is more likely to sink into the soft ground and why ?

256. A farmer has two carts. The carts have the same weight but one has four narrow wheels and the other has four wide wheels.

In rainy weather, which cart sinks less into soft ground, and why ? 254. A student places his thumb firmly on the outlet of a bicycle pump , to stop the air coming out.

IGCSE Physics

37


General Physics

A

Cart wheels Narrow

B

Narrow

C

Wide

D

Wide

Why Greater pressure on the ground Less pressure on the ground Greater pressure on the ground Less pressure on the ground

The water in the manometer is replaced with a liquid which is more dense. How does the value of h change ? A. it becomes zero B. it decreases but not to zero C. it stays the same D. it increases 260. The diagram shows a simple mercury barometer.

257. The diagram shows a thick sheet of glass. Which edge must it stand on to cause the greatest pressure ?

If atmospheric pressure increases, what happens to level X and to level Y.

258. A manometer is being used to measure the pressure of the gas inside a tank. A, B, C and D show the manometer and different times. At which time is the gas pressure inside the tank greatest ?

A B C D

Level X Goes down Goes down Goes up Goes up

Level Y Goes down Goes up Goes down Goes up

261. Four flower vases have circular bases. They are filled with water so that they all have the same weight. Which vase exerts the greatest pressure on its base?

259. A pressure is measured using a manometer as shown in the diagram. 262. A large electric motor is used to lift a container off a ship. Which of the following values are enough to allow the power of the motor to be calculated ? A. the mass of the container and the distance moved B. the force used and the distance moved C. the current used and the work done D. the work done and the time taken

IGCSE Physics

38


General Physics 263. Which diagram shows the child exerting least pressure on the ground.

266. The diagram shows a simple mercury barometer.

264. The diagram shows a mercury barometer.

The atmospheric pressure increases. Which distance increases ? A. VW C. XY B. WY D. XZ 267. The diagram shows a simple mercury barometer.

Which distance is used to calculate the pressure of the atmosphere? C. 80 cm A. 25 cm B. 65 cm D. 100cm 265. To prevent a cement mixer sinking into soft ground, the mixer is placed on a large flat board.

Atmospheric pressure increases. What happens to the level L and to the pressure P ? A B C D

Why does this prevent the mixer sinking ? A. The large area decreases the pressure on the ground B. The large area increases the pressure on the ground C. The large area decreases the weight on the ground D. The large area increases the pressure on the ground

IGCSE Physics

Level L Falls Falls Rises Rises

Pressure P Increases Stays the same Increases Stays the same

268. Which form of energy is used to generate electrical energy in a tilde power station ? A. chemical energy B. gravitational energy C. internal energy(thermal energy) D. nuclear energy

39


General Physics

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