there is a .145 kg tennis ball moving at a speed of 11.0 m/s. The ball is struck by a racket, causing it to rebound in the
opposite direction at a speed of 36.8 m/s. What is the magnitude of the
change in the balls momentum?
momentum = mass x velocity
change in momentum = m1v1 - m2v2
= (0.145)(11.0 - (-36.8)) = (0.145)(47.8) = 6.93 kg-m/s
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