Question

# Use Newton's second law of motion to explain the following: (a) A cricketer pulls his hands back while catching a fast moving cricket ball. (b) An athlete prefers to land on sand instead of hard floor while taking a high jump.

Open in App
Solution

## (a) We pull our hands back while catching a fast moving cricket ball, because by doing so, we increase the time of catch, i.e. increase the time to bring about a given change in momentum, and hence, the rate of change of momentum decreases. Thus, a small force is exerted on our hands by the ball. (b) When an athlete lands from a height on a hard floor, his feet comes to rest instantaneously, so a very large force is exerted by the floor on his feet, but if he lands on sand, his feet push the sand for some distance; therefore, the time duration in which his feet comes to rest increases. As a result, the force exerted on his feet decreases and he is saved from getting hurt.

Suggest Corrections
10
Join BYJU'S Learning Program
Select...
Related Videos
Second Law of Motion
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program
Select...