Q. 18

The qualitative d A. Newton’s first law of motion

B. Newton’s second law of motion

C. Newton’s third law of motion

D. Law of conservation of momentum.

Answer :

Newton’s first law states that an object at rest will stay at rest and an object in motion will stay in motion with the same speed and direction unless and until an external force is applied on the object. Newton’s third law the action & reaction law. Law of conservation of momentum states that initial momentum is equal to final momentum.

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