Download CHAPTER 1 INTRODUCTION TO PHYSICS

CHAPTER 2 FORCE AND MOTION
2003
1.
The diagram shows a velocity-time graph for the motion of an object.
The momentum of the object is constant from
A
B
C
D
2.
0 s to 3 s
3 s to 6 s
6 s to 8 s
0 s to 8 s
The diagram shows a coin, marble and dried leaf being released at the same time
in a vacuum cylinder.
Which observation is correct?
A All three objects float in the cylinder
B All three objects reach the base at the same time
C The marble reaches the base earlier than the coin
D The coin and the marble reach the base earlier than the dried leaf
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3.
Choose the diagram which shows the student doing the maximum work.
4.
A softball player moves his hand backwards while catching a fast moving ball.
This movement of the hand is to
A increase the impulsive force
B increase the stopping time of the ball
C control the ball to stop it falling
2
5.
The diagram shows a box being pulled by a boy.
What is the acceleration of the box?
A
B
C
D
E
6.
2.50 m s-2
3.75 m s-2
5.00 m s-2
6.25 m s-2
8.75 m s-2
An iron ball is dropped from a height of 10 m above the surface of the moon.
Calculate the time taken for the iron ball to reach the surface of the moon.
[Moon gravitational acceleration =
A
B
C
D
E
7.
1
of earth gravitational acceleration]
6
0.6 s
1.4 s
1.7 s
3.5 s
12.0 s
The diagram shows an aeroplane accelerating at a constant height.
Which relationship between the forces is true?
A
B
C
D
F
F
U
U
=
<
=
>
G
G
W
W
3
2004
8.
Which object has the greatest inertia?
9.
Which graph shows a constant acceleration?
4
10.
The diagram shows a motor lifting a load of mass 8.0 kg. The motor takes 4 s to
lift the load to a height of 0.5 m.
What is the power of the motor?
A
B
C
D
E
11.
4W
10 W
16 W
40 W
160 W
The diagram shows a brick falling from a table.
What physical quantity of the brick is constant while it is falling?
A
B
C
D
Potential energy
Kinetic energy
Accelaration
Velocity
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12.
A ping pong ball is dropped onto a concrete floor. Which graph shows the relation
ship between the velocity of the ball with time?
13.
The diagram shows the path of ball rolling drown a smooth slope.
The ball has the greatest change in gravitational potential energy between the
positions
A
B
C
D
P and Q
Q and R
P and S
R and T
6
14.
The diagram shows a picture hanging on a wall.
Which vector diagram represents the forces, T1, T2,and W, that act on the picture?
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2005
15.
The time taken for an object to fall from a height of h m from the earth’s surface is
t s.
If the gravitational acceleration on the moon is 1.6 ms-2, compare the time taken
for the object to fall from the same height on the Moon.
A Same as t s
B Less than t s
C Longer than t s
16.
The diagram shows a student running up a staircase at a constant speed.
Which physical quantity increases while the student running up the staircase?
A Inertia of the student
B Momentum of the student
C Kinetic energy of the student
D Potential energy of the student
17.
The diagram shows two student skating towards P.
What will happen to the girl when the boy releases her hand?
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A
B
C
D
18.
Stays stationary
Moves towards P
Moves towards Q
Potential energy of the student
The diagram shows an athlete performing the high jump.
What is the function of the mattress?
A To reduce the collision time between the athlete and the mattress
B To reduce the change if momentum of the athlete when he hits the mattress
C To reduce the impulsive force acting on the athlete when he hits the mattress
19.
The diagram shows a pillion rider moving backwards when the motorcycle
accelerates.
The backward movement of the pillion rider can be explained by
A
B
C
D
the concept of inertia
the concept of equilibrium of forces
principle of conservation of momentum
principle of conservation of energy
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20.
The diagram shows forces F1 and F2 exerted on a wooden block placed on a table
surface. The friction between the block and the table surface is 2 N.
Which pair of forces F1 and F2 causes the wooden block to move with an
acceleration?
A
B
C
D
E
21.
F1/N
5
3
6
3
4
F2/N
7
5
4
2
1
The acceleration-time graph below shows the movement of an object.
Which velocity time graph represents the movement of the object?
10
22.
The diagram shows load M supported by the arrangement of springs, P, Q and R.
All the springs are identical.
Which comparison is correct about the extension of P, Q and R
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A
B
C
D
P<Q<R
Q<R<P
R<Q<P
Q<P<R
2006
23.
Diagram 1 shows a weightlifter successfully lifting a load of 60 kg.
Calculate the work done in lifting the load
A
B
C
D
24.
30 J
120 J
600 J
1200 J
Diagram 2 shows a parachutist landing with his legs bent.
12
Why does the parachutist bend his legs?
A To lengthen the time of impact of his feet with the ground
B To shorten the time of impact of his feet with the ground
C To lengthen the time of falling to the ground
25.
Diagrams 3 shows a metal sphere oscillating on a frictionless track.
Which of the following statements is true?
A
B
C
D
The kinetic energy of the metal sphere is minimum at R
The potential energy of the metal sphere is maximum at P
The principle of conservation of energy is not obeyed
The total energy of the metal sphere at S is higher than at R
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26.
Diagram 4 shows two trolleys, P and Q, on a frictionless plane. Trolley P moves
and collides with the stationary trolley, Q.
Which of the following statements is true?
A
B
C
D
27.
The collision is an elastic collision
Both trolleys do not undergo changes in momentum
The total momentum before and after the collision is the same
The total kinetic energy before and after the collision is conserved
Diagram 5 shows two metal spheres, P and Q.
Which of the following statements is true when P and Q are in free fall?
A
B
C
D
28.
The velocities of P and Q are the same
The acceleration of P and Q are the same
The momentum of P and Q are the same
The gravitational forces acting on P and Q are the same
Diagram 6 shows a load hanging on a spring balance is a stationary lift. The
reading of the spring balance is 20 N.
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Diagram 6
What is the reading of the spring balance when the lift moves up with an
acceleration of 2 ms-2 ?
A
B
C
D
E.
16 N
18 N
20 N
22 N
24 N
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29.
Diagram 7 shows a coin and a feather experiencing free fall in a vacuum
container.
Which physical quantity is constant?
A
B
C
D
Velocity
Accelaration
Momentum
Kinetic energy
2007
30.
Diagram 1 shows the path traveled by a car form P to S.
What is the displacement of the car?
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A
B
C
D
31.
5.0 km
6.8 km
8.2 km
9.0 km
Diagram 2 is a velocity-time graph showing the motion of an object.
Which of the following describe the motion of the object?
A
B
C
D
32.
OJ
Uniform acceleration
Increasing acceleration
Increasing acceleration
Uniform acceleration
JK
Decreasing acceleration
Decreasing acceleration
Uniform deceleration
Uniform deceleration
Diagram 3 shows a car on town.
Which of the following vector diagrams represents the resultant force, F, which
acts on the car?
17
33.
Diagram 4 shows a car with a mass of 1000 kg moving with an acceleration of 2
m s-2. There is a frictional force of 900 N acting on the car.
What is the force exerted by engine of the car?
A
B
C
D
35.
900 N
1100 N
2000 N
2900 N
Diagram 5 shows a box with a mass of 55 kg being dropped from a helicopter. At
the moment before touching the ground, the velocity of the box is 12 m s -1. The
box stops 2 seconds after touching the ground.
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What is the magnitude of the impulsive force acted on the box?
A
B
C
D
36.
Why are the front and rear sections of a car designed to crumple easily?
A
B
C
D
37.
To increase impact time
to decrease momentum
to increase friction
to decrease friction
A brick falls from a height of 10 m. Calculate the time taken for the brick to reach
the ground.
A
B
C
D
38.
660 N
330 N
122 N
110 N
0.5 s
0.7 s
1.0 s
1.4 s
When an object is in equilibrium of forces, the object
A
B
C
D
must stationary
must move with a uniform velocity
is either stationary or moving with a uniform velocity
either moves with a uniform velocity or with a uniform acceleration
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39
Hamid cycles at a velocity of 3.1 km h-1.
What is this velocity in m s-1.
A
B
C
D
40
0.09
0.86
1.16
11.61
Table 1 shows the results of an experiment to investigate the relationship between
load and extention when a spring is stretched.
Load F/N
Extention
x/cm
100
1.0
150
1.5
200
2.0
250
2.5
300
3.0
Table 1
The original length of spring is lo = 15.o cm. What is the manipulated variable?
A
B
C
D
41
Load, F
Extention, x
Original length of the spring, lo
Material used to make the spring
Diagram 2 shows the velocity-time graph of an object.
Which acceleration-time graph represent the same motion as the object?
A
20
B
C
D
42
Diagram 3 shows two trolleys of different masses. Both trolleys move at the same
velocity and fall over the edge of the table and hit the floor.
21
What is the same physics quantity for both trolleys?
A
B
C
D
43
Gravitational potential energy
Time taken to hit the floor
Kinetic energy
Momentum
Diagram 4 shows two identical balls, P and Q, moving towards each other with a
velocity of v and 2v respectively. The collision between the two balls is an elastic
collision.
Which statement is correct about the elastic collision?
A The momentum of the ball P before the collision is equal to the momentum of ball
Q before the collision
B The total momentum before the collision is equal to the total momentum after the
collision
C The kinetic energy of ball P before the collision is equal to the kinetic energy of ball
Q before collision
D The total kinetic energy before the collision is not equal to the total kinetic energy
after the collision
44
F1, F2 and F3 are forces with the same magnitude acting on a wooden block. Which
diagram shows the maximum resultant force acting on a wooden block?
22
45
The forces are in equilibrium in all the phenomena below except
A
B
C
D
46
a car descending a hill at constant velocity
a lamp hanging at reset in a hall
a mango falling from a tree
a ship floating at rest in the sea
Which situation shows no work being done?
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47
Diagram 5 shows a stroboscopic photograph of a ball dropped from a height.
Which physics quantity remains constant as the ball falls?
A
B
C
D
48
Velocity
Momentum
Acceleration
Kinetic energy
The Brownian motion of smoke particles is due to the smoke particles
A
B
C
D
having higher temperatures than the air molecules
being randomly hit by other smoke particles
being randomly hit by air molecules
having lower kinetic energy than the air molecules
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