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Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 10 (25 MCQs)

Quiz Instructions

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1. What causes the motion of a body which is initially in the state of rest?
2. What is the formula for calculating Momentum?
3. What formula is used to calculate force?
4. WHAT IS NEWTON'S THIRD LAW OF MOTION
5. Newton's ..... Law of Motion means that for every force there is a reaction force that is equal in size, but opposite in direction.
6. Force is defined as:
7. Momentum is a ..... quantity
8. In the following example, try to identify the number of times the velocity of ball changes: "A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team."
9. STONE, 50 G OF WOOD WHICH ONE HAVING MORE INERTIA .....
10. Only one force can act on an object at a time.
11. Force required in accelerating a 3 kg mass at 5 m/s$^{2 }$and a 4 kg mass at 4 m/s$^{2}$, will be
12. WHEN A NET FORCE ACTS ON AN OBJECT WILL BE ACCELERATED IN THE DIRECTION OF THE FORCE WITH ACCELERATION INVERSELY PROPORTIONAL TO
13. In cricket the fielder while making a catch gradually pulls his hands backwards with moving ball. This is an application of
14. A book weighs 4 N. When held at rest in your hands, the net force on the book is
15. Newton's second law gives the measure of
16. Acceleration is caused by a force acting on a mass.
17. In any collision, ..... is always constant.
18. A constant force acts on an object of mass 5kg for a duration of 2 seconds. It increases the object velocity from 3m/s to 7m/s. Find the magnitude of the applied force. Now if the force was applied for the duration of 5 seconds, what would be the final velocity of the object?
19. A bullet of mass 0.1 kg is fired with a speed of 100 m/s, the mass of the gun being 50 kg. The velocity of recoil is
20. For every action, there is an equal and opposite reaction
21. The tendency of an object to just keep doing what it is doing.
22. A rubbing together force that slows things down and stops them. It works against motion.
23. A moving car suddenly stops, and the passengers tend to move forward due to:
24. MOTION FIRST EQUATION OF MOTION IS
25. Number of forces acting on a body changes velocity of the body. The forces are
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