peperiksaan pertengahan tahun 2011

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SECTION A40 marks

Each question is followed by four options. Choose the best option for each question then blacken thecorrect space on the answer sheet. 1 Which of the following does not relate to physics field?

A. movement of gas particle.B. phenomenon of rainbow.C. covalent and ionic bonding.D. to produce more shiny diamond

2 Which of the following physical quantities consists of derived quantities?A Temperature, time, forceB Electric current, length, timeC Force, velocity, electric chargeD Velocity, force, length

3. Which of the following is a derived physical quantity?

A. mass C. electric currentB. temperature D. weight

4 Which of the following is a scalar quantity?A Distance C AccelerationB Velocity D Force

5. Which of the following value of prefix is correct?Prefix Value of prefix

A Giga 10 8

B Desi 10-1

C Milli 10-6

D Nano 10-7

6 A radio station transmit a radio waves at 90.3 MHz. What is the frequency in units of Hz ?A. 90.3 X 104 Hz C. 90.3 X 106 HzB. 90.3 X 105 Hz D. 90.3 X 107 HzE. 90.3 X 109 Hz

7. The equatorial diameter of earth is 12 760 000 m. Which is written with the correct prefix?A. 1.276 Mm. C. 0.1276 GmB. 0.01276 Gm D. 12.76 μm

8. Which of the following is the correct converted unit ?A 1 000 mm3 = 1.0 x 10 -4 m3

B 100 mm3 = 1.0 x 10-2 m3

C 450 mm3 = 4.5 x 10-7 m3

D 45 mm3 = 4.5 x 10 -6 m3

9. A physical quantity is defined as the product of velocity and time. What is the S.I. unit of thisquantity?A. kg m s-2 C. m s-1

B. kg m s-1 D. m10.

10. Diagram 1 shows the scales on a pair of analogue stop watch and digital stop watch .

1



Analogue stop watch Digital stop watchDiagram 1

Which comparison is correct about the sensitivity of the analogue stop watch anddigital stop watch when measuring time?

Analogue stop watch Digital stop watch

A Low sensitivity Low sensitivity

B Low sensitivity High sensitivity

C. High sensitivity Low sensitivity

D. High sensitivity High sensitivity

11. The vernier calliper reading in Diagram 2 isA. 0.05 cm C. 0.55 cmB. 0.35 cm D. 1.50 cm

12. Four students A, B, C and D use metre rule (R), vernier callipers (V)and micrometer screw gauge (M), to measure the thickness of a book. The measurements obtained are recorded in a table below. Whichrecord is correct?

R ( cm ) V ( cm ) M ( cm )

A 4.213 4.21 4.2

2

Vernier

Diagram 2



B 4.2 4.21 4.213

C 4.213 4.2 4.21

D 4.21 4.213 4.2

13. Diagram 3 below shows a method of estimating the diameter of a wire using a ruler

The diameter of the wire isA 0.12 cm C 0.27 cmB 0.13 cm D 0.28 cm

14. The equation below shows the relationship between image distance, v withmagnification, M, for a convex lens.

v – 10 = 10 M

Which of the following graphs shows the relationship between v and M for the aboveequation?

3

20 turnsRod

WireRuler

Diagram 3

A C



15 Which of the following is not a purpose of plotting graph in scientific investigation?A Giving a consistent measurementB Finding relationship between two variablesC Find the values that out of rangeD Interpreting data

16 Which of following describe vector quantitiesA. Energy is needed to melt the iceB. The thrust needed to launched rocket.C. Capacitance of capacitor D. Speed of the car.

17. Diagram 4 shows the journey of a bus from city A to reach city D.

What is the displacement of the bus?A 60 km C 128 kmB 100 km D 220 km

18. Diagram 5 shows a graph of velocity against time for the motion of a bus.

How far does the bus travel before itreaches a steady velocity?

A. 10 mC. 100 mB. 20 mD. 200 m

19. Diagram 6 shows a ticker tape that wasobtained from an experiment by using a

4

B D

Diagram 4

Diagram 5



trolley A of mass 2 kg and a trolley B. Trolley A was released from one end of platformso that it moves downwards and collides with the stationary trolley B. After the collision theystick and move together. What is the mass of trolley B?

A 0.5 kg C. 1.5 kgB 1.0 kg D. 2.0 kg

20. Diagram 7 shows a Formula-1 racing car.

Diagram 7Why does the car’s design engineer use light composite materials for making the

body of the car although its engine is powerful ?A Acceleration increases if mass decreases.B A small mass produces a large force.

C A large force produces a large inertia.D The cost of composite material of small mass is low.

21. Diagram 8 below shows two objects with different masses are dropped simultaneously froma height. Which quantity is same for both of the objects?

A Weight C Final velocityB Velocity D Rate of change of velocity

22. The graph in Diagram 9 below representing the motion of a vehicle.

5

Before collision After collision

Diagram 6

Diagram 8



What is the acceleration and displacement of the vehicles? Acceleration/ ms-2 Displacement/ mA 4 800B 6 600C 4 400

D 6 400

23. Diagram 10 is a velocity-time graph showing motion of a car.

Which statement describes the motion of the car?OX XY

A Uniform acceleration Uniform deceleration

B Uniform velocity Uniform deceleration

C Uniform acceleration Uniform velocity

D Uniform velocity Uniform acceleration

24. Diagram 11 shows a car is accelerating with a frictional force of 6000 N acting on it.

6

Diagram 9

Diagram 10



What is the force exerted by the engine of the car ? A. equal to 6000 N B. greater than 6000 NC. smaller than 6000 N

D. 0 N

25. Diagram 12 shows Proton Exora’s crumple zone.

Diagram 12

What happen if there is no crumple zone for the cars?A Time of impact will increase and increase the level of injuriesB Time of impact will increase and increase the impulsive force to the car C Time of impact will decrease and increase the impulsive force to the car D Time of impact will decrease and avoid the driver from injuries

26 The following item is for safety features in vehicles, except.A rubber bumper B larger rimC anti-scatter windscreenD Anti-Lock-Breaking System (ABS)

27. A force can do the following except.A move a stationary objectB stop a moving objectC decelerate a moving objectD alters the quantity of matters of the object

28 . Diagram 13 shows trolley A and B of same mass on a frictionless plane. Trolley Amoves and collides with the stationary trolley B.

7

Accelerati

Friction force

Diagram11



Which of the following statements is true?A The collision is an elastic collisionB Both trolleys do not undergo changes in momentumC The total momentum before and after the collision is the sameD The total kinetic energy before and after the collision is conserved

29. Diagram 14 shows a coconut falling from a tree.

Which acceleration–time graph represents the motion of thecoconut?

8

Before collision

plasticine

After collision

Diagram 13

Diagram 14

Accelerati Acceleration

time time

A C



30. Diagram 15 shows a boy walking, thrown forward when he accidentally kicked a stone

Which of the following physics concept is responsible for the boy thrown forward?A Momentum C. ImpulseB Inertia D. Energy

31. Which of the following has the highest net force?

32. Diagram 16 shows a tape charts. Every strip has 5 ticks

9

Accelerati Acceleratio

time time

B D

Diagram 15

A

B

C

D



If 50 Hz frequency is used, calculate the accelerationA 20.0 cms-2 C 160.0 cms-2

B 100.0 cms-2 D 200.0 cms-2

E 250.0 cms-2

33. Which of the velocity-time graph below shows a movement of a car which is slowingdown and then stops?

10

A C

B D

Time/ t

Diagram 16

Length/

velocity

velocit

velocit velocit

time

time

tim

tim



34. Kasim kicks a stationary ball of mass 1.2 kg with a force of 15 N and the time of impact between his boots and the ball is 0.2 s. Calculate the maximum velocity achieved bythe ball.A 2.5 ms-1 C 25.0 ms-1B 15.0 ms-1 D 30.0 ms-1E 90.0 ms-1

35. A coconut falls from a tree of height 2.3 m. Which of the following quantities relating to thecoconut remains unchanged during the fall?A The gravitational potential energy of the coconutB The velocity of the coconut.C The acceleration of the coconut.D The displacement of the coconut.

36. The diagram below show the forces acting on a block. Which block experiences thehighest net force?

37. Between the following statements, which is not true about an object which is moving

with constant acceleration?A. The object is moving in a straight lineB. No force is acting on the objectC. The resultant force on the object is greater than zeroD. The resultant force on the object is constant

38. Diagram 17 below shows two vectors a and b.

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A

B

C

D

Diagram 17



Which of the following correctly represents the vector addition of the vectors a and bwhich results in the resultant vector c?

39. Diagram 18 shows two objects being dropped during the moon exploration.

Which of the is true when both objects were dropped?A. The velocity of plasticine and feather are constant.B. The rate of change of velocity of plasticine and feather are the same.C. The momentum of plasticine and feather are the same.D. The plasticine dropped faster than the feather

40. Diagram 19 shows an aeroplane flying horizontally with increasing velocity.

12

A

B

C

D

plasticine feather

Moon

Diagram 18



Which of the following statement is correct?A Weight > Lift C Drag = ThrustB Lift > Weight D Thrust > Drag

Section B(30 marks)

Answer all questions

1. Diagram 1 shows a micrometre screw gauge when the jaws are closed.

a) Name the part label R.

……………………………………………………………………………………..

[1 mark] b) What is the function of the part label R?

………………………………………………………………………………………[1 mark]

c) What is the value of zero error shown by the micrometre above?

…………………………………………………………………………………………[1 mark]

d) Identify the sensitivity of the micrometre screw gauge

…………………………………………………………………………………………

[1 mark]

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Diagram 19

Thrust

Lift

Drag

Weight

Diagram 1



2. Diagram 2a(i) shows a boy pushing a shopping cart at the start of a shopping trip andDiagram 2a(ii) shows the cart at the end of the shopping trip.(a). (i) Define mass.

………………………………………………………………………………………….

[1 mark](ii) State whether mass is scalar quantity or a vector quantity.

………………………………………………………………………[1 mark]

(b) (i) Compare the mass of the cart in Figure 2a(i) and Figure 2a(ii).

………………………………………………………………………………[1 mark]

(ii) Which cart would be more difficult to start moving?

……………………………………………………………………………….

[1 mark](iii) Which cart would be more difficult to stop once it’s moving?

………………………………………………………………………………..[1 mark]

(iv) Based on your answers in b(i)-(iii), state the relationship between mass andthe rate of change in motion.

…………………………………………………………………………………

…………………………………………………………………………………[1 mark]

(c) .Name the physics concept involved in (b).………………………………………………………………………………………..

[1 marks]

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Dia ram 2a(i) Dia ram 2a(ii)



(d) Diagram 2b(i) and Figure 2b(ii) show tankers with the same capacity but builtdifferently. Which tanker is safer to be used?

…………………………………………………………………………………………[1 mark]

3. Diagram 3.1 and 3.2 show two watermelons fall off a table and drop on to surface A andsurface B respectively.

(a). What is meant by impulse?

………………………………………………………………………………[1 mark ]

(b) With reference to Diagram 5.1 and Diagram 5.2,(i) Compare the force on the watermelons that strike on Surface A and

Surface B.

………………………………………………………………………[1 mark ]

(ii) Compare the time of impact of the watermelons on Surface A andSurface B.

.

………………………………………………………………………[1 mark ]

(iii). State the relationship between the force produced in a collision and thetime of impact.

………………………………………………………………………[1 mark ]

(c) Mark with a (√ ) for the correct statement about the change of momentum of thewatermelons in both situations above.

The change of momentum of the watermelon in Diagram 3.1 is greater thanthat of the watermelon in Diagram 3.2.

15

Tanker with 5 small tank Tanker with 1 big tank

Diagram 2b(i) Diagram 2b(ii)

Surface A Surface B

Diagram 3.1 Diagram 3.2



The change of momentum of the watermelon in Diagram 3.2 is greater thanthat of the watermelon in Diagram 3.1.

The change of momentum of the watermelon in Diagram 3.1 is equal to thatof the watermelon in Diagram 3.2.

[1 mark ]

(d) Suggest a suitable material for surface B.

…………………………………………………………………………………………[1 mark ]

By referring to the Diagram 3.3, explain how the driver is able to avoid seriousinjuries when the car stopped suddenly.

………………………………………………………………………………………………

……………….………………………………………………………………………………

……………….………………………………………………………………………………[2 marks]

4. A boy with mass 50 kg climbs up a 2.5 m wall from the ground level and jump down asshown in Diagram 4.

(a) (i) Name the energy gained by the boy before the jump?

................…………………………………………………………………….[ 1 mark ]

(ii) State the energy change experienced by the boy before the leg hit the ground.

……………………………………………………………………………………………

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Diagram 3.3

Diagram 4



[ 1 mark ](b) Based on the information given on Diagram 4, calculate

(i) the speed of the boy just before his legs touch the ground.

[ 2 marks](ii) the impulsive force produced when the time of action between

his legs and the ground is 0.03 s.

[ 2 marks ](c) 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.Your answer should base on the following criteria(i) The egg’s casing

……………………………………………………………………………….Reason

……………………………………………………………………………….[ 2 marks]

(ii) Method for soft landing

…………………………………………………………………………………Reason

…………………………………………………………………………………[ 2 marks]

5. Diagram 5.1 shows a goal keeper catch a ball using a pair of gloves. The ball is stoppedwithin 0.5 s. Diagram 5.2 shows a taut racket string is used to hit a tennis ball. The time taken

by the racket to hit the ball is 0.01 s. The ball moves at high velocity.

(a) What is meant by velocity?

………………………………………………………………………………………….[ 1 mark ]

17

Diagram 5.1

Diagram 5.2



(b) Based on Diagram 5.1 and Diagram 5.2, compare the types of surface used to catchand hit a ball with the time taken. Relate the reaction time and the force to deduce arelevant physics concept.

…………………………………………………………………………………………

………………………………………………………………………………………….

…………………………………………………………………………………………

…………………………………………………………………………………………[5 marks ]

(c) Before starting a volleyball match, the ball that will be used must have suitable air pressure. Explain why a low pressured ball is not suitable to be used in volleyballmatch.

…………………………………………………………………………………………

……………………………………………………………………………………….

………………………………………………………………………………………….

…………………………………………………………………………………………[4 marks]

Diagram 5.3(d) Diagram 5.3 shows a model of a car. As an engineer, you are given a task to modify

the car to be a racing car for a Formula One Grand Prix at Sepang Circuit. Suggestmodifications that need to be done on the car so that(i) The car can move faster and stable while it is being driven(ii) The car is comfortable and does not bounce when passes bumpy track (iii) The car’s driver is safe if any accident happens.

Modification Reason

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[10 marks ]

END OF QUESTION PAPER

Prepared by Jill Peary Raju

Checked by En Hanapi

Ketua Panitia Fizik

Verified by En Yazi Bujang

Ketua Bidang Sains Dan Matematik

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peperiksaan pertengahan tahun 2011