State Newton’s third law of motion.
Q.1. State Newton’s third law of motion.
Ans. It states that to every action there is an equal and opposite reaction.
Q.2. Name the unbalanced force which slows down a moving bicycle when we stop pedalling it.
Ans. Force of friction.
Q.3. While playing football the goalkeeper didn’t get sufficient time to stop a fast ball shot towards him. Why did he hurt his hand while doing so?
Ans. Because the momentum decreased to zero in a small time resulting in a large force.
Q.4. During the game of table tennis, if the ball hits a player it does not hurt him. On the other hand when a fast moving cricket ball hits a spectator it may hurt him. State reason.
Ans. According to Newton’s second law of motion, force produced by objects depends on the product of their mass and velocity.
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