When a balloon held between the hands is pressed, its shape changes. This happens because:
Anonymous Quiz
39%
Balanced forces act on the balloon
45%
Unbalanced forces act on the balloon
9%
Frictional forces act on the balloon
6%
Gravitational force acts on the balloon
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The speed of a car weighing 1500 kg increases from 36 km/h to 72 km/h uniformly. What will be the change in momentum of the car?
Anonymous Quiz
24%
15000 kg km/h
45%
15000 kg m/s
27%
54000 kg m/s
3%
54000 g m/s
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A passenger in a moving train tosses a coin which falls behind him. Observing this statement what can you say about the motion of the train?
Anonymous Quiz
54%
Accelerated
21%
Retarded
14%
Along circular tracks
11%
Uniform
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A man wearing a bullet-proof vest stands on roller skates. The total mass is 80 kg. A bullet of mass 20 g is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is then the velocity of the man?
Anonymous Quiz
19%
1 m/s
43%
0.1 m/s
25%
0.01 m/s
13%
0 m/s
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The unit of measuring the momentum of a moving body is:
Anonymous Quiz
17%
m/s
53%
kg.m/s
20%
kg.m/s2
10%
N m2/kg2
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The inertia of a moving object depends on:
i. Mass of the object ii. Momentum of the object iii. Speed of the object iv. Shape of the object Choose the correct option:
i. Mass of the object ii. Momentum of the object iii. Speed of the object iv. Shape of the object Choose the correct option:
Anonymous Quiz
27%
(i) and (ii)
51%
only (i)
12%
only (ii)
9%
(iii) and (iv)
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A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to:
Anonymous Quiz
10%
Exert large force on the ball
23%
Increases the force exerted by the ball on hands
25%
Increase the rate of change of momentum
42%
Decrease the rate of change of momentum
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An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a friction less horizontal table. The force required to keep the object moving with the same velocity is:
Anonymous Quiz
10%
32 N
51%
0 N
14%
2 N
25%
8 N
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Newton’s third law of motion explains the two forces namely ‘action’ and ‘reaction’ coming into action when the two bodies are in contact with each other. These two forces:
Anonymous Quiz
20%
Always act on the same body
63%
Always act on the different bodies in opposite directions
11%
Have same magnitude and direction
5%
Acts on either body at normal to each other
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A water tank filled upto 2/3 of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would
Anonymous Quiz
21%
Move backward
61%
Move forward
13%
Come to the rest
5%
Be unaffected
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When a balloon held between the hands is pressed, its shape changes. This happens because:
Anonymous Quiz
45%
Balanced forces act on the balloon
39%
Unbalanced forces act on the balloon
11%
Frictional forces act on the balloon
4%
Gravitational force acts on the balloon
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Which of the following situations involves the Newton’s second law of motion?
Anonymous Quiz
15%
A force can stop a lighter vehicle as well as a heavier vehicle which are moving
32%
A force exerted by lighter vehicle on collision with a heavier vehicle results in both the vehicles
39%
A force can accelerate a lighter vehicle more easily than a heavier vehicle which are moving
14%
A force exerted by escaping air from a balloon in downward direction makes the balloon to go upwards
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The speed of a car weighing 1500 kg increases from 36 km/h to 72 km/h uniformly. What will be the change in momentum of the car?
Anonymous Quiz
22%
15000 kg km/h
49%
15000 kg m/s
24%
54000 kg m/s
4%
54000 g m/s
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A passenger in a moving train tosses a coin which falls behind him. Observing this statement what can you say about the motion of the train?
Anonymous Quiz
57%
Accelerated
21%
Retarded
11%
Along circular tracks
11%
Uniform
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A man wearing a bullet-proof vest stands on roller skates. The total mass is 80 kg. A bullet of mass 20 g is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is then the velocity of the man?
Anonymous Quiz
18%
1 m/s
50%
0.1 m/s
24%
0.01 m/s
8%
0 m/s
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The unit of measuring the momentum of a moving body is:
Anonymous Quiz
13%
m/s
57%
kg.m/s
22%
kg.m/s2
8%
N m2/kg2
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