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QAnalyze an oblique impact using the conservation of momentum and coefficient of restitution

As shown, tennis ball A rolls off the top of a 10m high wall, falls 4m, and strikes another tennis ball, B, obliquely. (Part A 1 figure) Before the collision,tennis ball B has a speed of 29.0 m/s as it moves upward. Each ball's mass is 57 g and the collision's coefficient of restitution is 0.650. (Part A 2 figure) Inthe figure Teta 1=30 degrees, φ1=20 degrees. What is VA1, the velocity of tennis ball A, immediately before the collision? Express your answer in m/suploaded image

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#1AntoniaAnswered at 2013-02-20 08:25:29
8.86
free falling object
v^2=Vinit^2+2a(s-so)
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