A golf ball m = 0.155 kg strikes a vertical concrete wall elastically with a horizontal velocity of v = 15 m/s.   a. Write an expression for the magnitude of the impulse I experienced by the ball.  b.  If the ball was in contact with the wall for t = .1s, what is the magnitude of the force F the ball experienced in N?  c.  If the ball rebounds with only half the velocity it comes in with, what is the magnitude of the impulse in kg m/s?

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