4531/2 Fizik Kertas 2 Mei 2007 2 ½ Jam
Nama
: :………………………………… :………………………………………Tingkatan:…… ……Tingkatan:……
SEKTOR SEKOLAH BERASRAMA PENUH BAHAGIAN SEKOLAH KEMENTERIAN PELAJARAN MALAYSIA PEPERIKSAAN PERTENGAHAN TAHUN 2006 TINGKATAN 4 FIZIK KERTAS 2 Dua jam tiga puluh minit
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU.
1. 2. 3. 4. 5.
6. 7.
8.
Kert Kertas as soal soalan an ini ini menga mengand ndung ungii tiga tiga bahag bahagia ian n : Bahagian A, Bahagian B dan Bahagian C Jawab semua soalan. Jawapan kepada ketiga-tiga bahagian ini hendaklah diserahkan bersama-sama. Jawapan kepada Bahagian A dan C hendaklah ditulis dalam ruang yang disediakan dalam dalam kertas soalan. Jawapan kepada Bahag hendaklah dijawab dijawab Bahagian ian B hendaklah dalam kertas tambahan.. Walau bagaimanapun kertas tulis tulis tambahan tambahan sekiranya sekiranya digunakan, digunakan, perlulah perlulah diikat diikat bers bersama ama deng dengan an buku buku soal soalan an ini. ini. Dala Dalam m jawa jawapan pan anda, persamaan, gambar rajah, jadual, graf dan cara lain lain yang yang sesuai sesuai untuk untuk menjel menjelask askan an jawapan jawapan anda anda boleh digunakan. digunakan. Rajah tidak dilukis mengikut skala kecuali dinyatakan. Markah maksimum yang diperuntukkan ditunjukkan dalam kurungan pada hujung tiap-tiap soalan atau bahagian soalan. Penggunaan kalkulator saintifik yang tidak boleh diprogramkan adalah dibenarkan
Untuk Kegunaan Pemeriksa Bahagian Soala Markah 1 2 3 4
A
5 6 7
B
8 9
C Jumlah Besar
10
2 Kertas ini mengandungi 20 halaman bercetak
The following information may be useful. The symbols have their usual meaning. v −u
1
a=
2.
v2 = u2 + 2as
3.
s = ut + ½ at2
4.
Momentum = mv
5.
F = ma
6.
Kinetic Energy = ½ mv2
7.
Potential Energy = mgh
8.
Elastic Po Potential En Energy = ½ F x
9.
g = 10 ms-2
10.
Power =
t
energy time
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Section A [ 52 marks ] Answer all questions in this section. The time suggested to answer this section is 60 minutes
1. Diagram 1 shows a micrometer micrometer screw gauge used to measure measure the diameter of a wire. wire.
Diagram 1 (a) (i) Name Name the part part labell labelled ed P. …………………………………………………………………………………... [1m] (ii) State the function of P. …………………………………………………………………………………... [1m] (b) The diameters diameters of the the wire at three three different different places places are shown in table table 1.
1 3.120
Diameter, d (mm) 2 3.20
3 3. 2
Table 1 (i) Which of the reading is written correctly when using using micrometer screw gauge? ………………………………………………………………………………… [1m] (ii) Why is the the diameter measured three times? ………………………………………………………………………………… [1m]
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2. A student determine the diameter diameter of a length of wire wire X by winding 20 turns of the wire round a pencil as shown in Diagram 2.
Diagram 2 The total thickness of wire X was measured by using a plastic ruler which is 1.5 cm. (a) Calculate Calculate the the diameter diameter of wire wire X in unit unit of of mm. mm.
[1m] (b) State the the main advantage advantage of using using this this method method compared compared to measuring measuring the diameter of only one turn of wire Y by using a ruler. ……………………………………………………………………………………… [1m] (c) Give one example example of system systematic atic error error and one example example of random random error error that that may exist in the above measurement. ……………………………………………………………………………………… ……………………………………………………………………………………… [2m] (d) Suggest Suggest a more appropri appropriate ate measuring measuring instrum instrument ent that you you can find in in the laboratory for measuring the diameter of wire Y. ……………………………………………………………………………………… [1m]
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3. The diagrams below show the signboards signboards which are found at the roadside. roadside.
Diagram 3.1
Diagram 3.2
(a) Compare Compare the type of physical physical quantity quantity shown shown on the diagrams diagrams above. ……………………………………………………………………………………… ……………………………………………………………………………………… [2m] (b) State the characte characteristi risticc of both type of quantities. quantities. ……………………………………………………………………………………… ……………………………………………………………………………………… [2m] (c) Based on Diagram Diagram 3.1, 3.1, convert convert the the quantity quantity of 90 kmh-1 into SI unit.
6 [2m]
4. A car moves with an average speed speed of 75 kmh-1 from town P to town Q in 2 hours as shown in Diagram 4. By using this information, information, you may calculate the distance between the two towns.
Diagram 4 (a) (i) Based on the statements statements given, state state two base quantities quantities and their respective SI units. …………………………………………………………………………………... …………………………………………………………………………………... [2m] (ii) State a derived quantity and its SI unit. ………………………………………………………………………………….. [1m] (iii) Calculate the distance between town P and Q.
[2m] (b) Calcul Calculate ate the volume volume of a wooden wooden block block with dimens dimension ionss of 7 cm length length,, 5 cm 3 width and 12 cm height in m and express the answer in scientific notation.
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[2m] 5. Diagram 5.1 shows a boy , whose mass iiss 40 kg is running towards a 2 kg skateboard with a velocity of 20 ms-1. The boy then then jumps onto onto the skatebo skateboard ard and moves moves forward. Diagram 5.2 shows a frog with a mass of 100 g which is at rest on a 10 g stationary leaf. The frog then jumps from the leaf to the river bank.
Diagram 5.1
Diagram 5.2 a) Observe Observe Diagram Diagram 5.1 and Diagra Diagram m 5.2 and compare compare the type type of movement movement of the the boy after jumping onto on to the skateboard and the frog after jumping from the leaf to the river bank. ……………………………………………………………………………………… ……………………………………………………………………………………… [2m] b) (i) Compare the total momentum for the boy before and after he jumps onto the skateboard.
8 …………………………………………………………………………………. [1m]
(ii) Calculate the velocity of the boy after after he jumps onto the skateboard. skateboard.
[2m] (iii) State the principle involved. ………………………………………………………………………………… [1m] c) A girl girl whose whose mass mass is 30 kg runs runs with with the the veloci velocity ty of 20 ms-1 to the identical skateboard as shown in Diagram 5.1. (i) Calculate the momentum of the girl.
[2m] (ii) Compare the total momentum between the girl g irl and the boy in Diagram 5.1. …………………………………………………………………………………... [1m] (iii Give your reason for your answer in (c) (ii). …………………………………………………………………………………... [1m]
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6. Diagram 6.1 and Diagram 6.2 show a student pulling the elastic elastic string of the arrow arrow in a shooting exercise using different pulling stretch.
Diagram 6.1
Diagram 6.2 (a) Observe Observe Diagram Diagram 6.1 6.1 and Diagra Diagram m 6.2. (i) Compare the stretching force applied to the arrow. arrow.
10 ………………………………………………………………………………….. [1m]
(ii) Based on the answer in 6 (a)(i), (a)(i), compare the work done by the the student between the two pulling techniques. ………………………………………………………………………………….. [1m] (iii) If the applied force is 50 N and the distance of x is is 20 cm, calculate the work done by the student.
[2m] (b) Based Based on both diagr diagrams ams,, (i) compare the energy gained by the arrow. ………………………………………………………………………………… [1m] (ii) compare the distance distance of projection. …………………………………………………………………………………... [1m] (iii) state the relationship between energy and distance of projection. ………………………………………………………………………………….. [1m] (c) Make a suggestion to increase the distance of projection. projection. ………………………………………………………………………………………... [1m]
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7. A car is moving along a straight straight road. The driver applies the brake when a traffic light turns red. Diagram 8 shows the the velocity – time graph for the movement of the car.
-1
V / ms
Graph V against t 30
25
20
15
10
5
0 1
2
3
4
5
6
t/s
Diagram 7 Based on the graph, (a) calcul calculate ate the the deceler decelerati ation on of the the car.
[2m] (b) (i) what happen to the the velocit velocity y of the car when t increases? t increases? …………………………………………………………………………………..
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(ii) determine the velocity of the car when the brake is applied at first. (show your step in the graph given) ………………………………………………………………………………… [2m] (c) (i) calcula calculate te the area area under the graph graph between between t = 0 s and t = 5 s. s.
[2m] (ii) name the physical quantity which represents the value in (c)(i). …………………………………………………………………………………... [1m] (d) (i) name the physical physical quantity quantity which remains remains constant. constant. …………………………………………………………………………………... [1m] (ii) determine the time taken for the car to stop. …………………………………………………………………………………... [1m]
(iii) sketch a graph of deceleration against time.
[2m]
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Section B [20 marks ] Answer all questions in this section. The time suggested to answer this section is 30 minutes.
Diagram 8 8(a) Diagram 8 shows a parachute parachute attached to a man’s body whose weight is 65 kg when he jumps off from the plane. The ropes used are very light, strong, 3.5 m long and do not occupy a big space. The table 8 below shows a few types of ropes which could be used to make the parachute. Ropes J K L M
Length 3.6 X 102 mm 3.6 X 10-3 km 3.6 X 102 cm 3.6 dm
Density 1.2 gcm-3 1.5 gcm-3 4.8 gcm-3 3.5 gcm-3 Table 8
Snapping force 450 N 950 N 650 N 1050 N
(i) What is meant by standard form in writing a numerical value?
Diameter 0.30 cm 7.0 X 10-3 m 0.50 cm 15 mm
[1m]
(ii) You are required to state the most appropriate characteristics of the rope to be used for the parachute. Then, determine which rope from the table above perfectly fits the characteristics that you have given. Justify your an swer. [10m] (b) (i) What is meant by scalar and vector quantity. (ii) Give one example each for scalar and vector quantity. [3m] (c) A coconut falls from a height of 20 m with the increasing rate of velocity 10 ms -1 for every second. (i) Calculate the time taken for the coconut to reach the ground. (ii) Sketch a graph to show the movement of the coconut for each of the following; -Velocity against time
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[6]
Section C [28 marks ] Answer all questions in this section.
The time suggested to answer this section is 60 minutes
9 . An experiment is carried out to study the relationship between the rise in temperature of water and the quantity of heat supplied when the mass of water is kept ke pt constant. The apparatus is set up as shown in Diagram 9.1. A heating coil of 1 kW is used during the experiment.
Diagram 9.1 At the beginning beginning of the experiment, experiment, the initial initial temperature temperature of the water which which is measured with a thermometer is recorded. The thermometer reading is shown in Diagram Diagram 2. The water is then heated for 5 minutes by using the heating heating coil and the temperature is recorded as shown in Diagram 3.The experiment is repeated for a time of t = 10 minutes, 15 minutes minutes , 20 minutes , 25 minutes minutes .The respective thermometer readings are shown in Diagram 4, Diagram 5, Diagram 6 and Diagram 7.
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(a) Based on the aim aim and procedure procedure of the experiment, experiment, identif identify; y; i) the manipulated variable ,
……………………………………………………………………………. [1 m]
ii) the responding variable ,
16 ………………………………………………………………………... [1 m ] iii) the fixed variable , ………………………………………………………………………… [1 m ] (b) Based on Diagram 2 determine the initial temperature temperature at the beginning of the experiment, θ = θ = ………………………… [1 m ] (c) Based on Diagram 2 to Diagram 7, determine the reading of thermometer. Tabulate your data of time, t and temperature, θ.
[4 m]
(d) On a sheet sheet of graph graph paper, paper, plot a graph graph tempera temperature, ture, θ against time , t . [7 m ] (e) State the the relationshi relationship p between temperat temperature, ure, θ a θ and time ,t time ,t .
…………………………………………………………………………………… [1 m ]
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10. A student carried out an experiment to investigate the relationship between mass, m and period of oscillation , T using inertial balance. The student uses different masses of plasticine and record the corresponding period of oscillation, T . He then plotted a graph of T 2 against m as shown in Diagram 10.
Graph T 2 against m
T 2 / s2
4.0
3.0
2.0
1.0
20
10
30
50
40
60
m/g
70
Diagram 10
0.2
0.4 1.6 1.0 0.8 1.8 1.4 0.6 0 1.2
10
20
30
40
50
60
70
80
m/g
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a) Based on the graph shown, i. state the relationship relationship between between T and m. …………………………………………………………………………………… …………………………………………………………………………………… [1m]
ii. Calculate the period, T if T if the mass of the plasticine used is 55 g. Show how you determine the value of T .
[3m] iii) Calculate the gradient of the graph of T 2 against m. Show on the graph how you determine the gradient.
[4m]
0
1
2
3
4
5
6
7
8
F / F / N
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(b) The student continue the the experiment using a plasticine labelled labelled Q. From the experiment , the period of oscillation obtained is 1.2 seconds. By using the plotted graph, determine the mass of plasticine Q.
[3m]
( c) State a precaution taken in this experiment . ………………………………………………………………………………………...
………………………………………………………………………………………... [1m]
END OF QUESTION PAPER
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