A tennis ball is moving at a velocity of + 54 m/s before a tennis player returns it with a velocity of - 58 m/s. If the ball was in contact with her racket for 0.8 s, what was its acceleration? (Assume the acceleration was constant throughout the hit.)

A. - 140 m/s2

B. - 5 m/s2

C. 72.5 m/s2

D. 112 m/s2

Question

Nia Donaldson

Physics

28 December, 20:14

A tennis ball is moving at a velocity of + 54 m/s before a tennis player returns it with a velocity of - 58 m/s. If the ball was in contact with her racket for 0.8 s, what was its acceleration? (Assume the acceleration was constant throughout the hit.)

A. - 140 m/s2

B. - 5 m/s2

C. 72.5 m/s2

D. 112 m/s2

+3

Answers (2)

Know the Answer?

Marlon · Answer 1

Acceleration = (change in speed) / (time for the change)

Change in speed = (speed at the end) minus (speed at the beginning)

Change in speed = (-58 m/s) minus (54 m/s)

Change on speed = - 112 m/s

Acceleration = (-112 m/s) / (0.8 s)

Acceleration = - 140 m/s²

Giuliana Salazar · Answer 2

a. 140 m/s2

A tennis ball is moving at a velocity of + 54 m/s before a tennis player returns it with a velocity of - 58 m/s. If the ball was in contact with her racket for 0.8 s, what was its acceleration? (Assume the acceleration was constant throughout the hit.)A. - 140 m/s2B. - 5 m/s2C. 72.5 m/s2D. 112 m/s2