A hockey ball of mass 200g hits on a hockey stick with a velocity 10m/s. Calculate the change in momentum if the ball bounces back on the same path with the same speed.
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Answer:
mass of ball = 200g = 0.2 kg
intial velocity = 10m/s
final velocity = -5m/s
intial momentum = 0.2 × 10
= 2Ns
final momentum = 0.2kg × -5m/s
= -1Ns
change in momentum = final momentum - intial momentum
= -1Ns -2Ns = 3Ns
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