A tennis ball leaves the racket of a tennis player with a speed of 65 m/s. The b

Question

A tennis ball leaves the racket of a tennis player with a speed of 65 m/s. The balls mass is 0.06 kg and is in contact with racket for 0.03 seconds . Her opponent returns her serve directly at her with an added force of 100 N for 0.03 seconds on the ball. The court is 24 m long. 1) What is the average force on the ball during the serve? 2) How fast is the ball going after her opponent returns the serve? A tennis ball leaves the racket of a tennis player with a speed of 65 m/s. The balls mass is 0.06 kg and is in contact with racket for 0.03 seconds . Her opponent returns her serve directly at her with an added force of 100 N for 0.03 seconds on the ball. The court is 24 m long. 1) What is the average force on the ball during the serve? 2) How fast is the ball going after her opponent returns the serve? A tennis ball leaves the racket of a tennis player with a speed of 65 m/s. The balls mass is 0.06 kg and is in contact with racket for 0.03 seconds . Her opponent returns her serve directly at her with an added force of 100 N for 0.03 seconds on the ball. The court is 24 m long. 1) What is the average force on the ball during the serve? 2) How fast is the ball going after her opponent returns the serve?

Explanation / Answer

1) Impulse = change in momentum = F t

0.06 (65 - 0) = F (0.03)

F = 130 N

2) Impulse by the second player, J = 100 x 0.03 = 3 N s

delta(v) = 3 / (0.06) = 50 m/s

v = 50 m/s

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