Tennis, anyone? Tennis players sometimes leap into the air to return a volley. (a) If a 57 g tennis ball is traveling horizontally at 72 m/s (which does occur), and a 61 kg tennis player leaps vertically upward and hits the ball, causing it to travel at 45 m/s in the reverse direction, how fast will her center of mass be moving horizontally just after hitting the ball? (b) If, as is reasonable, her racket is in contact with the ball for 30.0 ms, what force does her racket exert on the ball? What force does the ball exert on the racket?
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