Question

explain why, it is easier to stop a tennis ball in cricket ball moving with the same speed

Answer 1

let u be the velocity of the ball of mass m when it reaches the hand of the player catching it.

the initial momentum of ball = mu

when the cricketer stops the ball (v=0)

final momentum = mu

= m*0=0

change in momentum = final - initial

= 0-mu= -mu

if the cricketer does not pull back his hands and stops the ball as soon as touches the hand he will get very little time t 1 to stop the ball then force exerted

f 1=change in momentum\time interval=mu/t 1

but,

if the cricketer pulls back his hands along with the ball, he takes longer time to stop the ball the force now exerted by ball o his hands.

F 2= mu /t 2,since t 2>t 1 therefore

F 2<F 1

thus it is easier to stop a tennis then a cricket ball

Answer 2

Because the tennis ball have light weight it does not swing like leather ball because the tennis ball not have grip