State and explain the law of inertia (or Newton’s first law of motion).
Q.1. State and explain the law of inertia (or Newton’s first law of motion).
Ans. A body continues to be in its state of rest or of uniform motion a straight line, unless a force is applied on it.
Q.2. You are hurt when you kick a stone. Why?
Ans. The kick is the action and the reaction of the stone in accordance with Newton’s third law of motion, hurts the foot.
Q.3. Give an example of a force that merely changes the direction of motion of a body.
Ans. A force acting towards the centre of a circular path in which a body moves with constant speed merely changes the direction of motion of the body.
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