31-01-2017
Physics

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A tennis ball is thrown straight up and caught at the same height. Which of the following can be describe the motion of the ball when it reaches the apex?

A. The velocity of the ball is zero

B. The acceleration of the ball is zero

C. The acceleration of the ball is 9.8m/s^2 down

D. The acceleration of the ball is 9.8m/s^2 up

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31-01-2017

a. the velocity of the ball is zero

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31-01-2017

At the apex, choices 'A' and 'C' are both true.

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