A tennis ball with a mass of 55 grams experiences a contact time with a tennis racket for 29 milliseconds during an executed serve.  The velocity of the tennis ball when it leaves the racket during the serve is 75 m/s. a) What impulse (magnitude only) in Ns did the server exert on the tennis ball in his serve? b) What average force (magnitude only) in Newtons did the server exert on the tennis ball in the serve? c) If the opponent returned the serve with a speed of 53 m/s, what impulse (magnitude only) in Ns did the opponent’s racket exert on the ball during the return shot from the serve? (assume the velocity of the ball when it first hits the racket is the same as the serve velocity mentioned above) d) What average force in Newtons (magnitude only) did the opponent’s racket exert on the ball in the return shot if the ball was in contact with the racket for 28 milliseconds?

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