Bab 02 - Daya & Gerakan

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SBP 2008, question 1

Examiner ‘s use

Diagram 1.1 shows the graph of velocity against time for the motion of a car. Rajah 1.1 menunjukkan graf halaju lawan masa untuk gerakan sebuah kereta.

Rajah 1.1 Diagram 1.1 / Rajah (a)

State State the phys physica icall quanti quantity ty repres represent ented ed by Nyatakan kuantiti fizik yang diwakili oleh (i) (i)

The The gra gradi dien entt of of the the grap graph. h. kecerunan graf

………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) (ii) The area area und under er the the gra graph ph.. luas di bawah graf

………………………………………………………………………………………………………………...... [1 mark / 1 markah] (b)

Comp Comple lete te the the tabl tablee below below.. Lengkapkan jadual berikut. Section of the graph Bahagian graf OA AB

Type of motion of the car Jenis gerakan kereta

[2 marks / 2 mark markah ah]

[Lihat halaman sebelah

PHYSICS ©

2012 Hak Cipta Panitia Fizik SMAPT

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MRSM 2008, question 2

Examiner ‘s use

Diagram 2.1 shows a softball moving with high momentum. Rajah 2.1 menunjukkan bola lisut yang bergerak dengan momentum yang tinggi.

Rajah 2.1 Diagram 2.1 / Rajah (a) (a)

What What is mean meantt by mome moment ntum um?? Apakah yang dimaksudkan dengan momentum?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b)

-1

Calculate Calculate the the momentum momentum of the softba softball ll if the mass mass of the ball ball is 80g and its velocity velocity is 100 ms . -1 Hitungkan momentum bola lisut jika jisim bola ialah 80g dan halajunya halajunya ialah 100 ms

[ 2 mark / 2 mark markah ah] (c)

If the mass of of the ball is increas increased ed but its momentum momentum remains remains unchange unchanged, d, how does its its velocity velocity change? change? Jika jisim bola ditambah tetapi momemtum tidak berubah, berubah, bagaimanakah halaju berubah?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (d)

Using the concept concept of of force, force, explain explain why the player player needs needs to wear wear a glove to catch catch a fastfast- moving moving softball. softball. Menggunakan konsep daya, terangkan mengapa pemain perlu memakai sarung langan untuk menangkap bola lisut yang bergerak laju.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah]


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PAHANG 2009, question 2

Examiner ‘s use

Diagram 2.1(a) shows an empty pickup truck. Diagram 2.1(b) shows the same pickup truck carrying a crate. Rajah 2.1 (a) menurjukka menurjukkan n sebuah sebuah lori pengangkut pengangkut.. Rajah 2.1 (b) menunjukkan lori pengangkut yang sama membawa kontena barangan.

(a )

(b)


What What is mean meantt by by ine inert rtia ia?? Apakah yang dimaksudkan dengan inersia? inersia?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b)

Compare Compare the mass mass of the pickup pickup truck truck in in diagram 2.1(a) with the total mass of the pickup truck and crate in diagram 2.1(b). Bandingkan jisim lori pengangkut daiam rajah 2.1 (a) dengan jisim lori pengangkut beserta kontena barangan dalam rajah 2. 1(b).

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (c)

Compare Compare the inerti inertiaa of pickup pickup truck truck in diagram 2.1(a) with inertia of pickup truck and crate in diagram 2.1(b) Bandingkan inersia lori pengangkut dalam rajah 2.1 (a) dengan inersia lori pengangkut dan kontena barangan b arangan dalam rajah 2.1(b)

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (d) When When pick pickup up truck truck in in diagram 2.1(b) suddenly moves forwards, the crate will move backwards. Explain why. Apabila lori pengangkut dalam rajah 2.1(b) bergerak kehadapan kehadapan tiba-tiba, kontena barangan akan bergerak bergerak ke belakang. Terangkan mengapa.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (e)

Give Give one example example of posi positiv tivee effect effect of of inertia inertia.. Nyatakan satu contoh kesan inersia inersia yang positif

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah]


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TERENGGANU 2010, question 2

Examiner ‘s use

Diagram 2.1 shows a watermelon fall off a table and drop on to the floor surface. The watermelon of mass 1.5 kg experienced the change of momentum while falling. Rajah 2.1 menunjukkan sebiji tembikai terjatuh dan meja ke atas permukaan lantai. Tembikai yang benjisim 1.5 kg itu mengalami perubahan momentum ketika jatuh.


What What is is the meanin meaning g of of mome momentu ntum? m? Apakah yang dimaksudkan dengan momentum?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] -1

(b) Velocity elocity of the watermelon watermelon when when hitting the the floor surface surface is 2 ms . Calculate the momentum of the watermelon at the moment. -1 Halaju tembikai itu ketika menghentam permukaan permukaan lantai ialah 2 ms . Hitungkan momentum momentum tembikai tembikai pada ketika itu.

[2 mark / 2 markah] (c)

(i)

Mark with a (√) for the correct statement about the impact time between the watermelon and the floor surface. Tandakan dengan (√) bagi pernyataan yang betul mengenai masa tindakan di antara tembikai itu dengan permukaan lantai. The impact time is longer. Masa tindakan adalah panjang. The impact time is shorter. Masa rindakan adalah singkat. [1 mark / 1 markah]

(ii) Why the the watermel watermelon on is broken when hitting hitting the floor surfac surface? e? Mengapakah tembikal itu pecah apabila menghentam permukaan permukaan lantai?

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah]


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PERAK 2011, question 2

Examiner ‘s use

Diagram 2 shows a car of mass 1 500 kg moving along an even road. Rajah 2 menunjukkan sebuah kereta berjisim 1 500 kg sedang bergerak sepanjang jalan yang rata.

Rajah 2 Diagram Diagram 2 / Rajah (a) (a)

What What is mean meantt by by wei weigh ght? t? Apakah yang dimaksudkan dengan berat?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b)

Calcu Calculat latee the the weight weight of the car? car? Hitungkan berat kereta kereta itu?

[2 mark / 2 markah] (c)

What What happen happenss to the the passen passenger gerss when when the the car is is sudde suddenly nly stop stopped ped?? Apakah akan berlaku kepada penumpang penumpang apabila kereta tiba-tiba berhenti? berhenti?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (d)

Name Name the phys physics ics princ principle iple involv involved ed in (c). (c). Namakan prinsip fizik yang terlibat terlibat dalam (c).

……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah]


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PERLIS 2011, question 2

Examiner ‘s use

Diagram 2.1 shows two identical plasticine balls before being dropped from same height. Diagram 2.2 shows the situation when they hit a wood and a sponge. Rajah 2.1 menunjukkan dua ketul bebola plastisin yang serupa sebeluin dilepaskan dan ketinggian yang sama. Rajah 2.2 menunjukkan keadaan plastisin itu apabila menghempap kayu dan span.

( a)

( b)

(a)

Rajah 2.1 Diagram 2.1 / Rajah

(a)

(b )

2.2 Diagram 2.2 / Rajah

What What is the meanin meaning g of impulsi impulsive ve forc force? e? Apakah maksud dengan daya impuls?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] ( b)

(i)

Diagram 2.2 shows a smaller impulsive force? Which of Diagram Rajah 2.2 yang manakah menunjukkan daya daya impuls yang paling kecil?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (ii) Which statement statement correctly correctly describes describes the the time of impact impact of plastic plasticinc. inc. Mark Mark (√) in the correct box. Pernyataan manakah yang memerihalkan memerihalkan dengan betul tentang situasi masa masa hentaman plastisin plastisin tersebut. Tanda (√) pada kotak yang betul.

Time of impact on wood greater than on sponge Masa hentaman ke atas kayu lebih lebih besar daripada span Time of impact on sponge greater than on wood Masa hentaman atas span lebih besar daripada kayu [1 mark / 1 markah] (c)

-1

A 0.35 kg kg hockey hockey ball moves moves from rest with with veloci velocity ty 15 ms after been hitting. The time impact is 0.20 s. What is the impulsive force on hockey ball? -1 Sebiji bola bola hoki berjisim berjisim 0.35 kg bergerak bergerak dari dari keadaan keadaan pegun dengan dengan halaju 15 ms se/epas dipukul. Masa hentaman ialah 0.20 s. Berapakah daya impuls pada bola hoki?

[2 mark / 2 markah]


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JOHOR 2008, question 3

Examiner ‘s use

Diagram 3.1 shows a cheetah chasing a deer in a wild world. Given that the mass and velocity of the cheetah and the -1 -1 deer are 60 kg, 20 ms and 70 kg, 15 ms respectively. Diagram 3.2 shows the cheetah successfully landed it’s jaws on -1 the deer and both of them are moving with a same velocity of v ms . Rajah 3.1 menunjukkan seekor harimau bintang sedang mengejar seekor rusa. Diberi jisim dan halaju bagi harimau -1 -1 bintang dan rusa itu adalah masing-masing 60 kg, 20 ms dan70kg, 15ms . Rajah 3.2 menunjukkan harimau bintang -1 itu berjaya menangkap rusa dan kedua-duanya bergerak dengan halaju yang sama, v ms .


(a)

Rajah 3.2 Diagram Diagram 3.2 / Rajah

Name a physics physics quantity quantity that that relates relates the mass mass and and velocity velocity.. Namakan satu kuantiti fizik yang mengaitkan jisim jisim dengan halaju.

……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b) State State the type of energy energy that that is possessed possessed by the the running cheetah cheetah.. Nyatakan jenis tenaga yang dipunyai oleh harimau harimau bintang yang sedang berlari.

……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (c) Calculate Calculate the final final velocity velocity of the the cheetah cheetah and the the deer. deer. Hitung halaju spunya bagi harimau bintang dan rusa. rusa.

[2 mark / 2 markah] (d)

(i) (i)

Name Name the Physi Physics cs princ princip iple le tha thatt is invol involve ved d in the the abo above ve hunt huntin ing. g. Namakan prinsip fizik yang terlibat dalam pemburuan di atas. atas.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) Define Define the the Physics Physics principle principle that you you mension mension in (d)(i). (d)(i). Takrifkan prinsip fizik yang anda nyatakan dalam (d)(i).

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] [Lihat halaman sebelah

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Examiner ‘s use

Diagram 3.1 shows a pendulum bob of mass 0.6 kg is hung on the ceiling. Rajah 3.1 menunjukkan sebuah ladung berjisim 0.6 kg digantung dig antung kepada syiling.


In the diagram 3.1 , mark the direction and label the forces acting on the thread and the pendulum bob with label P and Q. Pada rajah 3.1 tandakan arah dan labelkan daya-daya yang bertindak kepada benang dan ladung dengan label lab el P dan Q [2 marks / 2 markah]

(b)

The thread thread is pull pulled ed side sideway way by a force, force, F so that the thread makes an angle of 30° with the vertical line as shown in diagram 3.2 Benang itu di tarik ke satu sisi dengan daya, F supaya benang itu membuat sudut 30° dengan garis tegak seperti dalam Rajah 3.2.

Rajah 3.2 Diagram 3.2 / Rajah (i)

In the space below, below, draw the triangle triangle of forces forces to to show the three three forces forces P, Q and F are in equilibrium. P, Q dan F dalam Pada ruang di bawah, lukis rajah segitiga daya untuk menunjukkan tiga daya P, keseimbungan.

[2 marks / 2 markah] (ii) (ii) Calc Calcul ulat atee the the forc force, e, F Hitung daya, F

[2 marks / 2 markah] [Lihat halaman sebelah

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TERENGGANU 2008, question 3

Examiner ‘s use

Diagram Diagram 3.1 shows a boy extending the elastic rubber of a catapult. Rajah 3.1 menunjukkan seorang budak lelaki sedang meregangkan sebuah lastik


State State the change change of energy energy when the stone stone is released released from the catapul catapult. t. Nyatakan perubahan tenaga yang berlaku berlaku bila batu itu dilepaskan daripada lastik tersebut. tersebut.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b) What happens to the distance distance of movement movement of the stone when a bigger mass mass of stone stone is used? Apakah yang berlaku kepada jarak gerakan batu bila jisim batu yang lebih digunakan?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (c)

The mass mass of the stone stone used used is 0.02 kg. kg. When When the elastic elastic rubber is is extended extended 0.2 m by a force of of 10 N, Jisim batu yang digunakan ialah 0.02kg. Apabila Apabila getah elastik diregangkan diregangkan sehanyak 0.2 m oleh daya 10 N. N. (i)

Calcul Calculate ate the store stored d potenti potential al ener energy gy in the elas elastic tic rubb rubber? er? Hitungkan tenaga keupayaan yang tersimpan tersimpan dalam getah elastik tersebut? tersebut?

[2 mark / 2 markah] (ii) (ii)

What What is the veloci velocity ty of of the the stone stone?? Berapakah halaju batu tersebut?

[2 mark / 2 markah] [Lihat halaman sebelah

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PERAK 2008, question 4

Examiner ‘s use

Diagram 4.1 shows a screw jack used to raise a metal cylinder. Rajah 4.1 menunjukkan jek pemutar digunakan untuk mengangkat logam satu silinder


What What is mean meantt by by wor work? k? Apakah yang dimaksudkan dengan kerja? kerja?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b)

(i)

To raise raise the the meta metall cylin cylinder der,, the avenge avenge force force exer exerted ted by by the the screw screw jack jack on the the cylin cylinder der is is 5500 5500 N and and the vertical distance moved is 0.1 m Calculate the work done Untuk mengangkat satu silinder, silinder, daya purata yang d ikenakan oleh jek pemutar ke atasnya adalah 5500 N dan jarak menegak adalah 0.1 m. Hitung kerja yang dilakukan.

[2 mark / 2 mark markah ah] (ii) To raise raise one cylinder cylinder,, a steady force of 35N was was needed to rotate rotate the handle handle of the screw jack. jack. The handle make 40 complete circular rotations ofradius 0.15 m. Calculate the work done. Untuk mengangkat satu silinder, silinder, daya 35 N digunakan untuk memutar handel jek pemutar. pemutar. Handel diputar 40 putaran lengkap pada jejari putaran 0.15 m. Hitungkan kerja yang dilakukan.

[2 mark / 2 mark markah ah] (c)

State State two causes causes of energy energy loss loss when when the the cylinder cylinder is is being being lifted. lifted. Nyatakan dua punca kehilangan tenaga apabila silinder silinder diangkat.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ 2 mark / 2 markah] [Lihat halaman sebelah

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SBP 2010 question 4

Examiner ‘s use

Diagram 4.1 shows a girl standing on a weighing weighing scale in a stationary lift. Diagram 4.2 shows the same girl girl in a lift -2 which is accelerating upwards at 2 ms Rajah 4.1 menunjukkan seorang budak perempuan berdiri berdiri di atas penimbang berat di dalam lif yang pegun. Rajah 4.2 -2 menunjukkan budak yang sama berada di dalam lif yang bergerak ke atas dengan pecutan 2 ms .

At rest Pegun

Moving up Bergerak naik



(a) Which Which of the two weighing weighing scales scales shows shows the bigger bigger reading? reading? Manakah di antara dua penimbang menunjukkan bacaan bacaan yang lebih besar?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b) Name and label label the the two forces forces acting acting on the girl girl in Diagram 4.1 Namakan dan labelkan dua daya yang bertindak bertindak keatas budak itu dalam Rajah 4.1.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ 2 marks / 2 mark markah ah] (c) If the mass mass of the girl is 50 kg, kg, what is is the reading reading of the the weighing weighing scale scale in Diagram 4.1 ? Jika jisim budak itu ialah 50 kg, berapakah bacaan bacaan penimbang berat dalam Rajah 4.1?

[1 mark / 1 markah] (d) Calculate Calculate the reading reading of the weighing weighing scale scale in Diagram 4.2. Hitungkan bacaan penimbang dalam Rajah 4.2.

[2 mark / 2 markah] (e) (e)

If the the cab cable le of the the lift lift in Diagram 4.2 snaps, what will be the reading of the weighing weighing scale? Jika kabel lif dalam Rajah 4.2 putus, berapakah bacaan yang akan ditunjukkan ditunjukkan pada penimbang tersebut?


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Examiner ‘s use

Diagram 5.1 shows an airplane maintaining a steady steady and level flight under the influence of four forces. Diagram 5.2 shows a load hanging from the middle of the string. T1 and T2 are tensions of the string and W are the weight of the load. The dotted line shows the resolved component of the tensions T1 and T2. Rajah 5.1 menunjukkan sebuah kapal terbang yang sedang bergerak dengan penerbangan yang tetap pada aras yang sama di bawah pengaruh empat daya. Rajah 5.2 menujukkan satu beban digantung pada bahagian tengah tali T1 dan T2 adalah tegangan tali dan W adalah berat beban. Garis putus-putus menujukkan komponen leraian daya bagi tegangan T1 and T2.



What What is mean meantt by by wei weigh ght? t? Apakah yang dimaksudkan dengan berat?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] ( b)

Based on Diagram 5.1 and Diagram 5.2 , Berdasarkan Rajah 5.l dan Rajah 5.2 , (i)

compar comparee the the forces forces acting acting on the the airpla airplane ne bandingkan daya yang bertindak ke atas kapal terbang vertically / secara menegak

………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………… horizontally / secara mengufuk

………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………… [2 mark / 2 markah] (ii) (ii)

Compar Comparee the the forces forces acting acting on on the load. load. Bandingkan daya yang bertindak ke atas beban. beban. vertically / secara menegak

………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………… horizontally / secara mengufuk

………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………… [2 mark / 2 markah]


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Compare Compare the type type of moti motion on of the the airpl airplane ane and the object object Bandingkan jenis gerakan kapal terbang dan objek

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (d)

Based Based on your your answer answer in 5(b) and and 5(c), relate relate the the type of motion motion with with the resulta resultant nt forces forces acting on the aeropla aeroplane ne or on the load. Berdasarkan jawapan anda dalam 5(b) dan 5(c), hubungkaitkan antara jenis gerakan dengan daya paduan yang bertindak ke atas kapal terbang terbang atau beban.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (e) (e)

Name Name the the phen phenom omen enon on sho shown wn in Diagram 5.1 and Diagram 5.2 . Namakan fenomena fizik yang ditunjukkan ditunjukkan dalam Rajah 5.1 dan Rajah 5.2.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah]


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KELANTAN 2010, question 5

Examiner ‘s use

Diagram 5.1 and Diagram 5.2 shows two pieces of plasticine are attached to two similar hacksaw blades of the same length. The two plasticines then are set to oscillate. The frequency of oscillations for both plasticines is determined as shown in Diagram 5.1 and Diagram 5.2. Rajah 5. l dan Rajah 5.2 menunjukkan dua ketul plastisin yang dilekatkan pada dua bilah gergaji yang sama panjang. Kedua-dua plastisin kemudiannya diayunkan. Frekuensi ayunan bagi kedua-dua plastisin ditentukan sebagaimana ditunjukkan dalam Rajah 5.1 dan Rajah 5.2.

Rajah 5.l Diagram 5.1 / Rajah (a)


What What is the meanin meaning g of freque frequency ncy?? Apakah maksud frekuensi? frekuensi?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] ( b)

Based bn Diagram 5.1 and Diagram 5.2 ; berdasarkan Rajah 5.1 dan Rajah 5.2: (i)

Compar Comparee the the mass mass of the two plasti plasticin cines. es. Bandingkan jisim kedua-dua plastisin.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) Compare Compare the the frequency frequency of oscillati oscillation.of on.of the two two plasticine plasticines. s. Bandingkan frekuensi ayunan ayunan kedua-dua plastisin.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (iii) Relate Relate the mass and the frequency frequency of oscillati oscillation on of the two plasticines plasticines Hubungkaitkan jisim dan frekuensi frekuensi ayunan bagi kedua-dua plastisin.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (c)

Name a physics physics concept concept involve involved d in these situations situations.. Namakan satu konsep fizik yang terlibat terlibat dalam situasi ini

……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah]


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What happen happen to the frequency frequency of oscilla oscillations tions when when the length length of the hacksaw hacksaw blade blade clamped clamped is shorter? shorter? Apakan yang berlaku kepada frekuensi frekuensi ayunan apabila panjang bilah gergaji gergaji yang diapit dipendekkan?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (e)

The time time taken for for 20 complete complete oscilla oscillations tions of the plasticin plasticinee is 10 seconds seconds.. Calculate: Calculate: Masa yang diambil untuk 20 ayunan lengkap bagi plastisin plastisin ialaih 10 saat. Hitungkan: (i) (i)

The perio period d of osci oscill llat atio ions ns.. Tempoh ayunan.

[1 mark / 1 markah] (ii) (ii)

The freque frequency ncy of oscill oscillatio ation. n. Frekuensi ayunan.

[1 mark / 1 markah]


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Examiner ‘s use

Diagram 5.1 shows two springs with the same or iginal length. Diagram 5.2 shows the two springs attached with 100 g load. Rajah 5.1 menunjukkan dua spring dengan panjang asal yang sama. Rajah 5.2 menunjukkan dua spring itu digan yang dengan beban 100 g.


(a)


What What is the the type type of energ energy y store stored d in the the spring springss in Diagram 5.1(b) ? Apakah jenis tenaga yang ter.simpan ter.simpan dalam spring pada Rajah 5.1(b)?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b) (b) Obse bserve rve Diagram 5.1(a) and Diagram 5.1(b). Perhatikan Rajah 5.1(a) dan Rajah 5.1(b). (i) (i)

Com Compare pare dia diame mete terr of spr sprin ing g A and spring B. B. Bandingkan diameter spring A dan spring B.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) (ii)

Compar Comparee the the exten extensio sion n of spring spring A and spring is B when are attached with 100 g loads. Bandingkan pemanjangan spring A dan spring B bila digantung dengan beban berjisim 100 g.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (iii) Compare Compare the the spring spring constant constant of of spring spring A and spring spring B. Bandingkan nilai pemalar spring bagi spring A dan spring B.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (c) Based Based on on the the answe answers rs in in 5(b), 5(b), Berdasarkan jawapan jawapan dalam 5(b), (i)

State State the relationsh relationship ip between between the extens extension ion of the spring and and the spring spring constant constant of of the spring. spring. Nyatakan hubungan antara pemanjangan spring den gan nhlal pemalar spring spring bagi spring tersebut .

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] [Lihat halaman sebelah

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State State the the physic physicss law law involv involved. ed. Nyatakan hukum fizik yang terlibat

………………………………………………………………………………………………………………...... .... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (d) (i)

Using Diagram 5.1(b) , what happens to the extension of the spring when two identical springs A are arranged in parallel and are used to support the 100 g load? Menggunakan Rajah 5.1(b), apakah yang berlaku kepada pemanjangan spring apabila dua spring A yang sama disusun secara selari dan digunakan untuk menyokong beban 100 g?

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) (ii)

Give Give one reas reason on for for your your answer answer in 5(d)(i 5(d)(i). ). Beri satu sebab bagi jawapan di 5(d)(i).

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah]


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MRSM 2008, question 7

Examiner ‘s use

3

Diagram 7.1 shows a wooden sampan of mass 200 kg with a volume of 2 m floating at sea. 3 Rajah 7.1 menunjukkan sebuah sampan kayu berjisim 200 kg dengan d engan isipadu 2 m terapung di taut.


(i)

Name the force F shown in Diagram 7. Namakan daya F yang ditunjukkan dalam Rajah 7.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) (ii)

What What is the relati relations onship hip betwee between n F and W? Apakah hubungan antara F dan W ?

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (b) Determ Determine ine the magnit magnitude ude of F. F Tentukan magnitud F

[ 2 mark / 2 markah] (c)

Another Another boat of similar similar mass mass and volume volume is built built from fibre glass glass to replace replace the the wooden wooden sampan. sampan. Fibre glass glass is stronger and can support a greater load. Satu sampan dengan jisim dan isipadu yang serupa dibina menggunakan kaca gentian untuk menggantikan sampan kayu. Kaca gentian adalah lebih kuat dan boleh menyokong beban yang lebih besar. besar. (i)

Give Give anoth another er reaso reason n why why fibre fibre glas glasss is chosen chosen.. Berikan satu sebab lain mengapa kaca gentian dipilih.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) Calculate Calculate the the maximum weight weight which which can be carried carried by the the fibre glass glass sampan sampan and still remain remain afloat. afloat. 3 (Given the the density of sea water is 1020 kg m ) Hitung berat maksimum yang boleh dibawa oleh sampan yang diperbuat dan kaca gentian dan masih kekal 3 terapung. (Diberi ketumpatan air taut ialah 1020 kg m )

[2 mark / 2 mark markah ah] [Lihat halaman sebelah

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(iii) What will happen happen if the fibre glass sampan sampan carrying the the maximum weight weight moves from the sea to a river? Apa akan terjadi sekiranya sampan kaca kaca gentian yang membawa berat maksimum maksimum tersebut bengerak dari laut ke sungai?

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (iv) (iv) Explai Explain n your your answe answerr in c (iii (iii)) Terangkan jawapan anda dalam c (iii)

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [2 mark / 2 markah]


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JOHOR 2009, question 7 Diagram 7.1 shows two identical trolleys P and Q on a frictionless horizontal runway. Trolley P is loaded with steel bars. Rajah 7.1 menunjukkan dua buah troll yang serupa P dan Q di atas landasan men gufuk tanpa geseran. Troli P diletakkan beberapa bongkah keluli di atasnya.

Horizontal runaway Landasan mengufuk Rajah 7.1 Diagram 7.1 / Rajah A horizontal force of 10 N act on trolley P and Q. Daya mengufuk 10 N yang hertindak ke atas atas troli P dan Q , (a)

(i)

Trolley Q moves faster than trolley P. Explain your observation? Troli Q bergerak lebih laju daripada troli P. Terangkan pemerhatian anda.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) State State the physical physical law that that explain explainss your your answer answer in (a) (i). Nyatakan hukum fizik yang menerangkan menerangkan jawapan anda dalam (a) (i).

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (b) (b) Trolley Q then moves down the frictionless slope as shown in Diagram 7.2. There is air resistance acting on the trolley when it moves down the slope. Troli Q kemudiannya menuruni landasan condong tanpa geseran seperti dalam Rajah 7.2. Rintangan udara bertindak ke atas troll ketika menuruni landasan .

Rajah 7.2 Diagram 7.2 / Rajah (c)

On the Diagram 7.2 , when the trolley Q is moving down the frictionless slope, label, Pada Rajah 7.2 , ketika troll Q menuruni landasan condong terpampas geseran, labelkan, (i)

the directi direction on of the force force due due to grav gravity ity Arah daya disebabkan gravitl. [1 mark / 1 markah]

(ii) the direction direction of of the force due to air resistance resistance.. Arah daya disebabkan rintangan udara. [1 mark / 1 markah] [Lihat halaman sebelah

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State State the effect effect of the air air resistan resistance ce to the motion motion of of trolley trolley Q along frictionless slope in Diagram 7.2 , Nyatakan kesan rintangan udara terhadap terhadap gerakan troll Q sepanjang !andasan condong tanpa geseran pada Rajah 7.2

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (d)

Comp Compar aree the the moti motion on of of trol trolley ley Q at the frictionless slope and the rough surface. Bandingkan porgerakan porgerakan troli Q pada landasan condong tanpa geseran dan permukaan kasar

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (e) (i)

T he he mass of trolley Q is 500 g. Calculate the gravitational potential energy of trolley Q, at the top of the slope. Jisim troli Q ialah 500 g. Kirakan tenaga keupayaan graviti bagi troli Q pada kedudukan tertinggi landasan.

[2 mark / 2 mark markah ah] (ii) (ii) The kine kineti ticc ener energy gy of of the the trol trolley ley Q at the top of the slope is 3.0 J. Calculate the total energy of the trolley. Tenaga kinetik troli Q pada kedudukan atas cerun lalab 3.0 J. Kirakan jumlah tenaga troli troli itu.

[3 mark / 3 mark markah ah]


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Examiner ‘s use

A boy with mass 50 kg climbs up a 2.5 m wall from the ground level and ju mp down as shown in Diagram 7.1 Seorang budak lelaki berjisim 50 kg memanjat sebuah tembok tembok setinggi 2.5 m dari paras bumi dan melompat terjun ke bawah seperti ditunjukkan dalam Rajah 7.1


(i) (i)

Name Name the the ene energ rgy y gai gaine ned d by the the boy boy bef befor oree the the jump jump?? Namakan tenaga yang dimiliki oleh budak itu sebelum melompat?

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) State State the energy energy change change experien experienced ced by the the boy before before the leg leg hit the ground. ground. Nyatakan perubahan tenaga yang dialami oleh budak budak itu sebelum memijak kaki ke bumi. bumi.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (b) Based Based on the the inform informati ation on given given on on Diagram 7.1 . calculate Berdasarkan makiumat makiumat dan Rajah 7.1 yang diberikan. Hitung (i)

The spee speed d of the the boy just just before before his his legs legs touch touches es the the ground. ground. Halaju budak itu sebelum kakinya memijak bumi.

[2 mark / 2 mark markah ah] (ii) The impulsive impulsive force force produced produced when the the time of action action between between his legs and and the ground ground is 0.03 s. Daya impuls yang bertindak ke atas peserta peserta jika masa tindakbalas antara kakinya dan bumi ialah 0.03 s.

[2 mark / 2 mark markah ah] [Lihat halaman sebelah

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(c)

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Impulsive force can caused severe damage. Suggest a method to reduce the impact of the impulsive force in egg’s drop competition from a height during a science carnival. Daya impuls boleh menyebabkan kerosakan kerosakan yang teruk. Cadangkan satu kaedah yang boleh mengurangkan kesan daya impuls dalam pertandingan mejatuhkan telor dan suatu tempat yang tinggi sempena satu karnival sains. Your answer should base on the following criteria Jawapan kamu hendaklah berdasarkan berdasarkan ciri berikut (i)

The egg’s casing / bekas telor ………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah] (ii) (ii) Meth Method od for for sof softt lan landi ding ng kaedah untuk pendaratan lembut

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah]


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SELANGOR 2009, question 7

Examiner ‘s use

Diagram 7.1 shows a tanker with a mass of 2900 kg. The trailer is carrying petrol in o ne big tank. Rajah 7. 1 menunjukkan lori tangki berjisim 2900 kg. Treler itu mengangkut minyak dalam sebuah tangki besar. .


-1

If the the tanker tanker starts starts from from rest rest and achieves achieves a velocity velocity of 40 ms ms in 20 s, calculate -1 Sekiranya lori tangki itu bermula b ermula dari kedaan rehat dan mencapai halaju 40 ms dalam masa 20 s, hitung (i) (i)

Its Its ac accele celera rati tion on.. pecutannya

[2 marks / 2 markah] (ii) (ii)

The force force acting acting on the tanker tanker.. Daya yang bertindak ke atas lori tangki itu.

[2 marks / 2 markah] (b) (b)

The The ta tanker in in Diagram 7.1 is used for transporting large amounts of petrol. Suggest modifications that can be made based on the following aspects. Lori tangki dalam Rajah 7.1 digunakan untuk rnengangkut kuantiti minyak yang besar. besar. Cadangkan pengubahsuaian yang perlu dibuat berdasarkan berdasarkan aspek berikut berikut (i)

number of tyr tyres bilangan tayar

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah] (ii) (ii) numb number er and and siz sizee of tank tankss bilangan dan saiz tangki.

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah] [Lihat halaman sebelah

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(c) Diagram 7.2 shows the speed limit displayed on the back of the tanker. tanker. Rajah 7.2 menunjukkan had laju yang dipaparkan dibelakang lori tangki tersebut.

Rajah 7.2 Diagram 7.2 / Rajah (i) (i)

What What is mean meantt by by spee speed? d? Apakah yang dimaksudkan dengan laju?

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) Explain Explain why the the speed speed limit limit must must be imposed imposed on on heavy heavy vehicles vehicles.. Terangkan mengapa had laju mesti dikuatkuasakan pada kanderaan berat.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah]


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Examiner ‘s use

Diagram 7.1 shows a log truck with a mass of 4000 kg. The log truck is carr ying a long and heavy load on it. Rajah 7.1 menunjukkan sebuah lori balak berjisim 4000 kg. Lori balak itu membawa muatan panjang dan berat di atasnya.


-1

If the the log truck starts starts from rest rest and and achiev achieves es a velocity velocity of 40 ms in 20 s, calculate; -1 Sekiranya ion balak itu bermula dan keadaan rehat dan mencapal halaju 40 ms dalam 20 s, hitung; hitung; (i) (i)

Its Its acce accele lera rati tion on Pecutannya.

[2 marks / 2 markah] (ii) (ii)

The force force acting acting on the log truck. truck. Daya yang bertindak ke atas lori balak itu.

[2 marks / 2 markah] (b) (b)

The The log log tru truck in Diagram 7.1 is used for transporting logs in a larger quantity safely. Suggest modifications that can be made based on the following aspects. Lori balak dalam Rajah 7.1 digunakan untuk mengangkut sejumiah kayu balak yang dalam jumlah yang Iebih besar dengan selamat. Cadangkan pengubahsuaian yang perlu dibuat berdasarkan berdasarkan aspek berikut. (i)

Number of of ty tyres / Bilangan tayar. tayar.

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah] (ii) (ii) The numb number er of binde binderr. Bilangan rantai pengikat.

………………………………………………………………………………………………………………...... Reason / sebab


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shows the speed speed limit limit displayed displayed on the the back of the the log truck. truck. Diagram 7.2 shows Rajah 7.2 menunjukkan had laju yang dipaparkan di belakang lori balak tersebut.

Explain why the speed limit must be imposed on heavy vehicles. Terangkan mengapa had laju mesti dikuatkuasakan pada kenderaan berat

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ 2 marks arks / 2 mark markah ah]


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KEDAH 2011, question 9

Examiner ‘s use

Diagram 7.1 shows a golfer getting ready to strike the golf ball. Rajah 7.1 menunjukkan seorang pemain golf bersedia untuk memukul bola golf


What What is is the the mean meanin ing g of ene energ rgy? y? Apakah maksud tenaga?

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah] (b)

-1

The mass mass of of a golf golf ball ball is 0.049 0.049 kg. kg. It trav travels els at at 20 ms when hit by the golfer. Calculate the kinetic energy of the golf ball. -1 Jisim sebiji bola golf ialah 0.049 kg. Bola itu bergerak bergerak dengan kelajuan 20 ms selepas selepas dipukul. Hitungkan Hitungkan tenaga kinetik bola 1itu.

[2 marks / 2 markah] (c) Explain Explain the transform transformation ation of energy energy of the golf golf ball from from the time time it is hit until until it lands lands on the ground. ground. Jelaskan transformasi tenaga bola golf golf itu dan ketika ia dipukul sehingga ia mendarat di tanah.

[2 marks / 2 markah] (d)

Suggest Suggest two ways ways by which which the golfer golfer can can increase increase the the range of the the golf ball.Give ball.Give reasons reasons for your your answers answers.. Cadangkan dua cara pemain golf itu dapat menambahkan julat bola golf itu. Berikan sebab bagi jawapan anda. i

Suggestion 1 / Cadangan Cadangan 1

………………………………………………………………………………………………………………...... Reason / sebab


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Suggestion 2 / Cadangan 2

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah]

(e) State State one other factor factor that that can affect affect the range of the golf ball. ball. Nyatakan satu faktor lain yang boleh mempengaruhi julat bola golf itu.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah]


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JOHOR 2011, question 8

Examiner ‘s use

Diagram 8.1 shows the graph of force against extension for three springs, P, Q and R. Rajah 8.1 menunjukkan graf daya melawan pemanjangan bagi 3 spring, P , Q dan R.


(i)

A law law stat states es that that the the extens extension ion of of a sprin spring g is dire directl ctly y propor proportio tional nal to the the force force appl applied ied if if the the elasti elasticc limit limit of the spring is not exceeded. Name this law. Suatu hukum menyatakan bahawa pemanjangan sebuah spring adalah berkadar langsung dengan daya dikenakan jika had kenyal tidak dilampaui Nyatakan hukum ini.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) (ii) On the the gra graph ph in Diagram 8.1 , marks ‘X’ at the elastic limit for spring P and Q. X ’ Pada graf dalam Rajah 8.1 , tandakan ‘ ’ pada had kenyal spring P dan Q. [1 mark / 1 markah] (b)

The sprin spring g stores stores ener energy gy when when it is is exten extended ded.. Spring itu menyimpan tenaga apabila diregang. Calculate the energy stored in spring R when its extension is 8.0 cm. Hitung tenaga yang disimpan dalam spring R apabila pemanjangannya 8.0 cm.

[3 marks arks / 3 mark markah ah]


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Diagram 8.2 shows the baby sleeping in the cradle. Rajah 8.2 di bawah menunjukkan menunjukkan seorang seorang bayi yang sedang tidur di dalam buaian. Spring Spring K L M


Spring constant Pemalar spring Low Rendah High tinggi High tinggi

-3

Density / kg m Ketumpatan / kg m -3

Elastic limit / N Had kenyal / N

4700

20

7860

48

2920

50

Jadual 8.1 Table 8.1 / Jadual

Table 8.1 shows the characteristics of 3 types of spring K, L and M. Rajah 8.1 menunjukkan ciri-ciri 3 jenis spring, K M . , L and M

Based on Table 8.1 state suitable characteristics characteristics of the spring so that it can be used used to make a cradle oscillates at suitable frequency. Berdasarkan Jadual 8.1 , nyatakan ciri.ciri yang sesuai bagi spring itu untuk menghasilkan buaian yang dapat berayun pada frekuensi yang sesuai Give reason for suitability of the characteristics Berikan sebab untuk kesesuaian kesesuaian ciri-ciri itu. (ii) (ii) Exte Extens nsio ion n of spr sprin ing g Pemanjangan spring

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah] (ii)

Density Ketumpatan

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah] (iii (iii)) Elast Elastic ic limit limit Had kenyal

………………………………………………………………………………………………………………...... Reason / sebab

………………………………………………………………………………………………………………...... [2 mark / 2 mark markah ah] (d) Determine Determine the the most suitable suitable spring spring that can can to be used to make make the cradle. cradle. Pilih spring spring yang paling paling sesuai sesuai untuk membuat membuat buaian

……………………………………………………………………………………………………………………………………….. [ l mark / 1 markah]


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KEDAH 2009, question 8 Diagram 8.1 shows the graph of force against extension for three springs P, Q and R. Rajah 8.1 menunjukkan graf daya melawan pemaijangan bagi tiga spring P , Q dan R.


(i)

A law law stat states es that that the the extens extension ion of of a spring spring is is direct directly ly propor proportio tional nal to to the force force applie applied d if the the elasti elasticc limit limit of the spring is not exceeded. Name this law. Suatu hukum menyatakan bahawa pemanjangan seutas spring adalah berkadar terus dengan daya yang dikenakan jika had kenyal tidak dilebihi. Nyatakan hukum ini.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... (ii)

On the the gra graph ph in Diagram 8.1 , mark ‘X’ at the elastic limit for each spring. X ’ pada had kenyal setiap spring. Pada graf dalam Rajah 8.1, tandakan ‘

[1 mark / 1 markah]

[1 mark / 1 markah] (b)

The sprin spring g stores stores ener energy gy when when it is is exten extended ded.. Spring itu menyimpan tenaga apabila diregang. (i)

Name Name the ener energy gy store stored d in the the spring spring when when it it is exten extended ded.. Namakan tenaga yang disimpan dalam spring spring yang diregang.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) (ii)

Calcul Calculate ate the the energ energy y stored stored in in spring spring R when its extension is 8.0 cm. Hitung tenaga yang disimpan dalam spring R pabila pemanjangannya 8.0 cm.


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The springs springs are to be used used in a Newton Newton balan balance ce to measu measure re a maximum maximum load load of mass 8 kg. Spring-spring tersebut akan digunakan di dalam neraca Newton untuk mengukur beban maksimum berjisim 8 kg. (i) (i)

What What is is the the maxi maximu mum m weig weight ht of of the the load load?? Berpakah berat maksimum beban itu?

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii)

Based on Diagram 8.1 , choose two springs which are suitable to be used in the Newton balance specified above. Berdasarkan Rajah 8.1 , pilih dua spring yang sesuai untuk digunakan digunakan di dalam neraca Newton Newton tersebut di atas.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [1 mark / 1 markah] (iii) Which spring is the most most suitable to be used in the Newton balance? Explain your answer. answer. Spring yang manakah paling sesuai untuk digunakan di dalam neraca Newton itu. Terangkan Terangkan jawapan anda.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [2 marks / 2 markah]


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N9 2011, question 8

Examiner ‘s use

Table 8.1 shows three types of remote control toy car and their characteristics. Jadual 8.1 menunjukkan tiga jenis kereta mainan kawalan jauh dan ciri-cirinya. Types of toy to y car Jenis kereta mainan

Tyres diameter Diameter tayar

Mass jisim

Voltage of batery used Voltan bateri yg digunakan

4.0 cm

1.3 kg

9.0 V

4.0 cm

2.5 kg

9.0 V

4.0 cm

1.7 kg

9.0 V

Toy car A / Kereta mainan A

Toy car B / Kereta mainan B

Toy car C / Kereta inainan C Rajah 8.1 Diagram 8.1 / Rajah (a)

(i)

Based on Table 8.1, which toy car is the most difficult to start moving? Berdasarkan Jadual 8.1 , kereta mainan yang yang manakah paling sukar untuk mula bergerak? bergerak?

………………………………………………………………………………………………………………...... [1 mark / 1 markah] (ii) Give one one reason reason for for the answer answer in 8a (i) and and state state the relationsh relationship ip between between the reason reason and and physics physics concept concept involved. Berikan satu sebab kepada jawapan di 8a (i) dan nyalakan hubungan di antara sebab dan konsep fizik yang terlibat.

………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... ………………………………………………………………………………………………………………...... [2 marks arks / 2 mark markah ah] (b) Diagram 8.2 shows Sarah is pushing a 5.0 kg box with difference forces on three type of rough surfce of wooden plane, P, Q and R. Rajah 8.2 menu menunjukka njukkan n Sarah Sarah sedang sedang menolak menolak kotak 5.0 kg denga dengan n daya-daya daya-daya yang yang berbeza berbeza di di alas perin perinukaan ukaan P,, Q , dan R. kasar satah kayu, P



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Table 8.2 shows the magnitude accelerations, a and force applied, F to push the box on each surface of wooden plane. Jadual 8.2 menunjukkkan magnitud pecutan, a dan daya F yang digunakan untuk menolak kotak tersebut di atas setiap permukaan satah kayu. Wooden Wooden Plane P lane Satah kayu Acceleration, a Pecutan, a (ms-2 ) Force, F Daya, F (N)

P

Q

R

4. 0

2. 5

4.5

50

40

30

Jadual 8.2 Table 8.2 / Jadual (i)

What What is is the the meanin meaning g of of fric friction tional al force? force? Apakah yang dimaksudkan dengan daya geseran? geseran? ... ………………………………………………………………………………………………………………...... [1 mark / 1 markah]

(c) Calculate Calculate the frictio friction n force force of each surface surface of wooden wooden plane. plane. Hitung daya geseran untuk setiap permukaan saiah kayu. (i)

Wooden den pl plane A satah kayu A

[2 mark / 2 markah] (ii) (ii) Woode ooden n plan planee B Satah kayu B

[1 mark / 1 markah] (iii (iii)) Woode ooden n plan planee C Satah kayu C

[1 mark / 1 markah] (d)

Determ Determine ine the the most most suita suitable ble surf surface ace of of wooden wooden plane to build a slide at children’s playgrounds. Give a reason. Tentukan permukaan satah yang paling sesuai untuk membina gelongsor di taman permainan kanak-kanak Berikan satu sebab.

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. [ 2 marks / 2 mark markah ah] (e)

State State two modificati modifications ons that that can be done done to reduce reduce the friction friction of the the slide. slide. Nyatakan dua modifikasi untuk mengurangkan geseran tersebut

……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………….

.

……………………………………………………………………………………………………………………………………….. [ 2 marks / 2 mark markah ah] [Lihat halaman sebelah

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Bab 02 - Daya & Gerakan

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