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You throw a ball straight up. What's the ball's acceleration at the top of the trajectory?
in Physics by Diamond (61,682 points) | 6 views

1 Answer

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The acceleration at the top is 9.8m/s2 downward, just as it is during the rest of the flight. The fact that v=0 at the top of the trajectory doesnt mean a=0. The ball is headed downward the instant before reaching the top and headed downward an instant later.

This change in velocity direction means that the ball must be accelerated at the top, and the only acceleration operating here is that due to gravity.
by Diamond (61,682 points)

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