WorksheetsCHAPTER 2 FORCES AND MOTION
Total questions: 20
Worksheet time: 18mins
Name
Class
Date
1.
Diagram below shows a trolley of mass 3.0 kg placed on a rough ground and being pulled by a force of 5.0 N. The trolley moves at constant velocity.
What is the frictional force between the trolley and the ground?
What is the frictional force between the trolley and the ground?
a)
0.6 N
b)
3.0 N
c)
5.0 N
d)
8.0 N
2.
Diagram below shows two weights, P and Q, of mass 2 kg and 4 kg respectively that are connected by two ropes, X and Y, which are similar.
If rope X and rope Y can only support a stretching force of 50 N, what will happen to this system?
If rope X and rope Y can only support a stretching force of 50 N, what will happen to this system?
a)
Rope X will break.
b)
Rope Y will break.
c)
Both ropes will break.
d)
Both ropes will not break.
3.
When a football player kicks a stationary football of mass 0.8 kg, its velocity becomes 12 m s–1 in 0.6 s. What is the impulsive force acting on the ball when kicked?
a)
1.3 N
b)
7.2 N
c)
9.6 N
d)
16.0 N
4.
The force constant of a spring can be increased by…
a)
increasing the length of the spring.
b)
decreasing the diameter of the coil of the spring.
c)
using copper wire instead of using steel wire as the coil of the spring.
d)
decreasing the diameter of the spring wire.
5.
A stone takes 2 s to fall from the top of a well to the water surface in the well.
What is the distance of the water surface from the top of the well?
What is the distance of the water surface from the top of the well?
a)
2.0 m
b)
10.0 m
c)
20.0 m
d)
40.0 m
6.
Diagram below shows the force extension graph for a spring.
What is the elastic potential energy stored in the spring when the extension is 10 cm?
What is the elastic potential energy stored in the spring when the extension is 10 cm?
a)
0.075 J
b)
0.150 J
c)
0.300 J
d)
7.500 J
7.
Diagram below shows a 800 kg car travelling at 20 m s–1 collides with a 200 kg motorcycle which is initially at rest. After the collision, the car and the motorcycle move together.
What is their velocity after the collision?
What is their velocity after the collision?
a)
4 ms-1
b)
8 ms-1
c)
16 ms-1
d)
20 ms-1
8.
Diagram below shows two identical trolleys, J and K, placed on a frictionless plane. Trolley J moves and collides with the stationary trolley, K. After collision, both trolleys stick and move together.
Which of the following statement is true?
Which of the following statement is true?
a)
Both trolleys do not experience any change in momentum.
b)
The type of collision is elastic collision.
c)
The total momentum after collision and the total momentum before collision is the same.
d)
The total kinetic energy after collision and the total kinetic energy before collision is the same.
9.
The diagram below shows an electric motor lifting a load of mass 7.2 kg. The motor takes 6.0 s to lift the load to a height of 0.8 m.
What is the ouput power of the motor?
What is the ouput power of the motor?
a)
1.0 W
b)
9.6 W
c)
34.6 W
d)
54.0 W
10.
Diagram below shows a boy with a mass of 20 kg is sitting on the top of a slide which has a height 250 cm from the ground. Given the work done to overcome the frictional force along the slide is 140 J.
What is the velocity of the boy when he reaches the ground?
What is the velocity of the boy when he reaches the ground?
a)
3.74 m s–1
b)
6.00 m s–1
c)
7.07 m s–1
d)
8.00 m s–1
11.
Diagram below shows firemen holding a hose which is spraying out water.
Several firemen are needed to hold the hose
Several firemen are needed to hold the hose
a)
to support the weight of the hose.
b)
to increase the mass of water coming out.
c)
to increase the speed of the water in the forward direction.
d)
to reduce the large recoil effect.
12.
An object moves with velocity v which varies with time as shown in Diagram below.
What is the distance of the object from its starting point after 3 seconds?
What is the distance of the object from its starting point after 3 seconds?
a)
6 m
b)
12 m
c)
18 m
d)
24 m
13.
Diagram below shows the way to pour out chilli sauce. The chilli sauce in the bottle can be easily poured out by moving the bottle down fast with a sudden stop.
The movement of the chilli sauce can be explained by...
The movement of the chilli sauce can be explained by...
a)
the concept of inertia.
b)
the concept of equilibrium of forces.
c)
the principle of conservation of momentum.
d)
the principle of conservation of energy.
14.
Diagram below shows the work done on a 2 kg object by a force F = 20 N in three different ways, J, K, and M. In each case, the object moves 1 m. Which case(s) has the least work done?
a)
Case J
b)
Case K
c)
Case M
d)
Case J and case K
15.
A ball falls from a height of 20 m. What is the time taken for the ball to reach the ground?
a)
1.0 s
b)
1.4 s
c)
2.0 s
d)
3.5 s
16.
Diagram below shows the path travelled by a bus from W to Z.
What is the displacement of the bus?
What is the displacement of the bus?
a)
4.0 m
b)
5.0 m
c)
8.1 m
d)
21.0 m
17.
An antique watch is pulled with a horizontal force F which makes an angle θ with the wall.
T is the tension of the string and W is the weight. The relationship between T, F and W is...
T is the tension of the string and W is the weight. The relationship between T, F and W is...
a)
W = T + F
b)
F = T cos θ
c)
W = T cos θ
d)
F = W sin θ
18.
When a block of wood with a mass of 3 kg is pulled along the horizontal flat surface of a bench, the frictional force acting on the block is 3 N.
What happens when the block is pulled by a force F = 15 N as shown in the diagram above?
What happens when the block is pulled by a force F = 15 N as shown in the diagram above?
a)
The block moves at a constant speed of 4 m s–1.
b)
The block moves at a constant speed of 5 m s–1.
c)
The block moves at a constant acceleration of 4 m s–2
d)
The block moves at a constant acceleration of 5 m s–2
19.
A ball is dropped from a high place to the ground. Which of the following quantities remain constant?
a)
The acceleration due to gravity.
b)
The gravitational force.
c)
The momentum.
d)
The velocity.
20.
Diagram below shows a ticker tape for the movement of a trolley.
If the frequency for one tick is 50 Hz, calculate the acceleration of the trolley.
If the frequency for one tick is 50 Hz, calculate the acceleration of the trolley.
a)
15 m s−2
b)
300 m s−2
c)
1500 m s−2
d)
3000 m s−2
100 %
