Question

why a cricketer lowers his hand while catching the ball​

Answer 1

To decrease the momentum or to lower the force

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Answer 2

Answer:

A cricketer lowers his hands while catching the ball to increase the time of catch.i.e. the person increases the time to bring about a given change in the momentum and hence the rate of change of momentum decreases. Thus, a small force is exerted by ball on the hands