Question: A 1.2-lb ball A is moving with a velocity vA when it is struck by a 2.4-lb ball B which has a velocity vB of

A 1.2-lb ball A is moving with a velocity vA when it is struck by a 2.4-lb ball B which has a velocity vB of magnitude vB = 18 ft/s. Knowing that the velocity of ball B is zero after impact and that the coefficient of restitution is 0.8, determine the velocity of ball A

(a) Before impact,

(b) After impact.

1.2 lb 2.4 lb B

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