test 2( august) physics form 4

8/3/2019 Test 2( August) Physics Form 4

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SEKOLAH MENENGAH KEBANGSAAN BUYONG ADIL

PHYSICS FORM 4

TEST 2 / AUGUST 2011

NAME : ____________________________________________ CLASS : ____________________

This question paper consists of40 questions. Answer all the question. Each question is followed by four options

A, B, C, and D. Choose the correct answer for every question.

Answer each question by blackening the correct space on the answer sheet.

1 Which of the following statements is true about

impulsive force?

A It is defined as change in momentum.B It is defined as rate of change of momentum.

C It is product of a force activity on an object

and the time taken.D It is defined as the force acting

perpendicularly on a unit surface.

2 Which of the following is the reason for a longjumper to bend his knees upon landing?

A To increase landing time

B To increase impulsive force

C To decrease landing time

3 An object of mass 3.0 kg moving with velocity

10 m s1

strikes on a stationary wall. The object

rebounds with velocity 8 m s1

within 0.2 s.What is the impulsive force acts on the object?

A 30 NB 120 NC 150 kg m s2

D 270 kg m s2

4 Peter bends his knees and jump down from awall. He lands on the floor with velocity 5 m s

1.

The mass of Peter is 60 kg. What is the

impulsive force that acts on Peter if the timeinterval to stop his motion is 0.5 s?

A 150 N C 600 N

B 300 N D 1 200 N

5 A ball of 1.2 kg with velocity 4 m s1

hit by a car

which moving in same direction with the ball.The velocity of the ball increase to 10 m s

1in

0.5 s. What is the impulse on the ball?

A 4.8 N s D 14.4 N s

B 7.2 N s C 12 N s

6 Which of the following features does not

improve the safety of passengers in a car?

A Seat belts

B Powerful engine

C Automatic air bag

7 A force,Facts on 0.060 kg tennis ball which

moving with velocity 2 m s1

. If the velocity of

the tennis ball change to 6 m s1 in oppositedirection within 0.08 s, what is the value ofF

applied?A 3.0 N C 4.5 NB 3.6 N D 6.0 N

8 An object is falling through a vacuum. Which ofthe following quantities does not change?

A Velocity

B momentumC Acceleration

D impulse

9 A water is launched vertically with a velocity of

20 m s1 . taking the acceleration of gravity g =

10 m s2 ,What is the maximun height reached?

A 5 mB 10 m

C 15 m

D 20 m

10 Which of the following statements is true about

the value of gravitational acceleration?A It is depends on the mass of the object.

B It is depends on latitude and altitude of the

object.

C It is constant at any location of same altitude.D It is constant at any location of height above

sea level in Equator of Earth.


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11 A box of 10 kg falls from a height of 20 m.

Calculate the time taken for the box to reach

the ground if the acceleration due to gravity is10 m s

2.

A1.4 s C 4.0 s

B2.0 s D 20 s

12 Which of the following statement is wrong

about gravitational field strength?A Its unit is N kg1.B It is directly proportional to the mass of the

object.

C Its value is same for each object in a samelocation.

D It is defined as the ratio of the weight to the

mass of the object.

13 When an object of mass 0.5 kg is falling freely,

it means that

A its weight is 5NB its weight is increasing

C its weight is decreasing

D its apparent weight is zero

14 A feather and a coin are released together in

perspex tube which is vacuumed. Whichphysical quantity will remain constant for both

the feather and the coin?A Momentum

B Acceleration

C Kinetic energyD Potential energy

15 The mass of an object is 10 g. In vacuum, it

falls freely to the ground. What is the weight ofthe object?

A 100 N C 1 N

B 10 N D 0.1 N

16 An object is thrown vertically up from the

ground with an initial velocity 20 m s1

. The

maximum height reached by the object isA 2.0 m C 20 m

B 10 m D 40 m

17 Weight is different from mass because

A weight is affected by the acceleration of

gravityB weight is scalar quantity

C weight is measured in kg

D mass is a vector quantity

18 A person in a lift will experience an increase in

weight if the lift is

A moving up with a velocity of 10 m s1B moving down with a velocity of 10 m s1

C moving up with a acceleration of 10 m s2

D moving down with a acceleration of 10 m s2

19 The weight of an object is 500 N in place X

where the acceleration of gravity is 10 N Kg -1 .what is its weight in place Y where theacceleration of gravity is 8 m s -2 ?

A 80 N

B 400 NC 500 N

D 625 N

20 The front portion of a car crumples easily

during a head-on crash. This feature can

improve safety because

A it prevents the car from skidding.B it increases the change in momentum of the

car

C it enables the car to stop in a longer timeduring the collision.

D it makes the structure of the car stronger.

21 If the resultant force on an aeroplane is zero,the aeroplane

A must be in stationary.

B must be moving with constant velocity

forward.C must be moving with constant velocity

upward.D must be no acceleration forward and upward.

22 Diagram 1 shows a block of weight 200 N isplaced on an inclined plane.

Diagram 1

Calculate the value of frictional force,Fwhen

the block is stationary.

A 400 N C 346 NB 123 N D 100 N


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23 Diagram 2 shows a poster of 1.2 kg hanging on

a wall by a rope at an angle of 40 to the

vertical.

Diagram 2

What is the tension of the rope?

A 4.6 N C 7.8 NB 6.0 N D 9.3 N

24 Diagram 3 shows a boy of 40 kg stands on alift moving with acceleration 1.5 m s

2.

Diagram 3

What is the force acting on the floor of the lift

due to the mass of the boy?A 340 N C 427 N

B 400 N D 460 N

25 Which of the following phenomena is not in

force equilibrium?

A A car moving with constant velocity.B A ship float at rest in the sea.

C A fan hanging at rest on the wall.

D An aeroplane accelerate uniformly in the air.

26 An object of mass 12 kg is placed on a planet

with gravitational field strength 6.7 N kg1

.

What is the weight of the object on the planet?A 1.79 N C 80.4 N

B 17.9 N D 120 N

27 Diagram 4 shows a force,Fpulling a 3 kg

wooden block horizontally on a smooth and flat

surface. The wooden block and load of 4 kgtied by a string.

Diagram 4

If the load accelerates with 2 m s2

upward,what is the magnitude ofF?

A 8.0 N C 48 N

B 40 N D 84 N

28 Diagram 5 shows a box resting on an inclined

plane at angle to the vertical.

Diagram 5

There are three forces acting on the box. By

using m for mass of the box,gfor the

acceleration due to gravity, andFfor frictionalforce, derive an equation to express the

frictional force of the box on the inclined planeAF= mgsin BF= mgcos

CF= mgtan

DF= mgcos (90 )

29 Diagram 6 shows a trolley of weight 40 kg

Being pushed by a force of 100 N at angle of

60.

Diagram 6

Calculate the acceleration of the trolley.

A 1 m s2 C 10 m s2B 1.05 m s2 D 10.05 m s2


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30 Diagram 7 shows a 10 kg load is suspended by

two threads.

Diagram 7

What is the tension of Thread 1?

A 50.0 N C 131 N

B 64.0 N D 156 N

31 Parachute is a device for making people or

objects fall slowly and safely when fall from a

high position. The function of parachute is dueto

A the density of the air is higher.

B the air resistance has been increased.C the weight of the object has been reduced.

D the acceleration due to gravity has been

decreased.

32 In diagram 8, a weight R is supported by two

forces, P and Q.

DIAGRAM 8

If the forces P, Q and R are in equilibrium,which statement below is not true?

A The tension on R is 20 N

B The foece P = Q cos 30

C The force R = Q sin 30

D The force P = R tan 30

33 Diagram 8 shows a flowerpot is being hung to

a wall with a rope of tention Tat angle . A

forceFis pulling the flowerpot from the right.

Diagram 8

Which of the following vector diagrams shows

the forces W, TandFacting on the flowerpot

correctly?

A

B

C

D


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34 In a diagram 9, three forces, F1, F2 and F3 and

20 N are in equilibrium.

Diagram 9

The value of F1 is

A 10 N C 17.3 NB 12 N D 20 N

35 Diagram 10 shows a picture of mass 2 Kg being

supported by two strings in equilibrium

Diagram 10

What is the tension force, T in the string?

A 10 N C 20 NB 11.5 N D 40 N

36 Diagram 11 shows a wooden block of 10 N

moving down s frictionless slope due to its

weight, F

Diagram 11

What is the value of F?

A 0 N C 8.7 NB 5 N D 10 N

37 Three forces acting on a point are inequilibrium.Which of the conclusion below is

correct

A All the three forces are acting in the samedirection

B The resultant force is zero

C The angle between adjacent forces is 60

D The angle between adjacent forces is 45

38 In diagram 12, what is the resultant force

formed by two forces of 10 N each?

Diagram 12

A 5 N C 15 N

B 10 N D 20 N

39 Diagram 13 shows an object of mass 0.5 kg

being pulled by a force, F against a friction of 5 N

Diagram 13

If the resultant force is 2 N, what is the valueof F?

A 2 N C 7 N

B 5 N D 14 N

40 Diagram 14 shows four forces acting indifferent directions.

8 N

Diagram 14

What is the resultant forces?

A 0 N C 10 NB 5 N D 14 N

END OF QUESTION PAPER

PREPARED BY, CHECKED BY,

___________________ ___________________(MASITA BT RAMLI) (MAHADI B. HJ SIDEK)

12 N4 N

2 N

test 2( august) physics form 4

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