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1.
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:
2.
The unit of measuring the momentum of a moving body is:
3.
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?
4.
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?
5.
Newton's first law of motion says that a moving body should continue to move forever , unless some external forces act on it. But a moving cycle comes to rest after some time if we stop pedaling it. Can you choose the correct reason for the stoppage of cycle?
i. Air resistance
ii. Gravitational pull of the earth
iii. Friction of the road
iv. Heat of the environment
Choose the correct option:
i. Air resistance
ii. Gravitational pull of the earth
iii. Friction of the road
iv. Heat of the environment
Choose the correct option:
6.
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?
7.
Which of the following situations involves the Newton's second law of motion?
8.
When a balloon held between the hands is pressed, its shape changes. This happens because:
9.
The seat belts are provided in the cars so that if the car stops suddenly due to an emergency braking, the persons sitting on the front seats are not thrown forward violently and saved from getting injured. Can you guess the law due to which a person falls in forward direction on the sudden stopping of the car?
10.
