When a 58g tennis ball is served, it accelerates from rest to a constant speed of 36 m/s. The impact with the racket gives the ball a constant acceleration over a distance of 35 cm. What is the magnitude of the net force acting on the ball?

Question

Nancy Combs

Physics

21 September, 18:32

When a 58g tennis ball is served, it accelerates from rest to a constant speed of 36 m/s. The impact with the racket gives the ball a constant acceleration over a distance of 35 cm. What is the magnitude of the net force acting on the ball?

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Answers (1)

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Karsyn Watson · Answer 1

We first calculate the acceleration on the ball using:

2as = v² - u²; u = 0 because ball is initially at rest

a = (36) ² / (2 x 0.35)

a = 1850 m/s²

F = ma

F = 0.058 x 1850

= 107.3 Newtons