A 1.2-lb ball A is moving with a velocity vA of magnitude vA = 24 ft/s when it is struck by a 2.4-lb ball B which has a velocity vB. Knowing that the velocity of ball A is zero after impact and that the coefficient of restitution is 0.2, determine the velocity of ball B

(a) Before impact,

(b) After impact.

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A 1.2 2.4 lb С B