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A ball of mass m moving with velocity v0 collides a wall. after impact it rebounds with a velocity 3/4v0. the impulse acting on ball during impact is



Initial momentum of the ball = mv₀
final momentum of the ball = -3/4 mv₀
so change in momentum during the process
= 7/4 mv₀ 
so impulse acting on the body = change in momentum = 7/4 mv₀
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