1. 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?

2. An object of mass 2 kg is sliding with a constant velocity of 4 ms^-1 on a frictionless horizontal table. The force required to keep the object moving with the same velocity is

3. 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?

4. A ball is thrown vertically upward in a train moving with uniform velocity. The ball will

5. A bullet of mass A and velocity B is fired into a wooden block of mass C. If the bullet gets embedded in the wooden block, then the magnitude of velocity of the system just after the collision will be

6. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to

7. When a car at high speed makes a sharp turn, the driver in a car tends to get thrown to the side opposite to the turn. This is due to the

8. 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?

9. If the mass of a body is doubled and its velocity becomes half, then the linear momentum of the body will

10. When a balloon held between the hands is pressed, its shape changes. This happens because:

11. A man is standing on a boat in still water. If he walks towards the shore, then the boat will

12. Which of the following is an incorrect statement?

13. Rocket works on the principle of conservation of

14. According to the third law of motion, action and reaction

15. The inertia of an object tends to cause the object