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A cricket ball of mass 200 g moving with...

A cricket ball of mass 200 g moving with a speed of 30 cm/s is brought to rest by a player is 0.03 second. Find (i) the change in momentum of the ball and (ii) the average force applied by the player.

Text Solution

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Here, mass (m)=200g=0.2 kg, initial velocity (u)=30m/s,
final velocity (v)=0, time taken (t)=0.03s
(i) change in momentum=(mv-mu)=0.2 (0-30)=-6 kg m/s.
(ii) Average force applied, F=rate of change of momentum
`=("change of momentum")/("time")=(6)/(0.03)(kg" "m//s)/(s)=200N`
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