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Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 5 (25 MCQs)

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1. The tendency of an object to resist a change in its motion
2. Force F= .....
3. A bullet of mass 10 gm is fired with an initial velocity of 20 m/s from a rifle of mass 4 kg. Calculate the initial recoil velocity of the rifle?
4. What can a force do?
5. A man is standing on a boat in still water. If he walks towards the shore, then the boat will AWAY FROM SHPORE it is example of
6. A truck and a car moving with the same velocity collide with a wall. Which of the following statements is true?
7. A particle of mass 0.2 kg is kept at rest.A force of 2 N acts on it for 2 second.Find the distance moved by the particle in (i) these 2 second and (ii) next 2 seconds if the same force is continued to be applied.
8. In a rocket, a large volume of gases produced by the combustion of fuel is allowed to escape through its tail nozzle in the downward direction with the tremendous speed and makes the rocket to move upward.Which principle is followed in this take off of the rocket?
9. Two astronauts are playing catch in space. The first astronaut throws the ball; and
10. How much net force is required to accelerate a 1000 kg car at 4.00 m/s$^{2}$?
11. A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to:
12. Two equal forces acting in opposite directions on an object
13. The first law of motion is also known as
14. Friction and gravity are both examples of a force.
15. A gun mass 6kg and bullet mass 4g and bullet moving with 8m/s find recoil velocity of gun
16. External forces are
17. A force of 100 N acts on a ball moving on a surface. The force of friction that must act between the surface of the ball and the surface so that the ball keeps on moving with constant velocity over the surface must be
18. Find the momentum of a 3.0 kg mass when it is stopped.
19. What is the formula for force?
20. 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
21. Acceleration is due to a force put on an objects mass.
22. What is Newton's First Law known as? The Law of
23. A cup of coffee sits on the dashboard of an automobile. The car goes around a sharp curve. Even though you hold the cup still, coffee splashes out. This is explained due to
24. Action and reaction forces
25. Momentum is defined as the product of:
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