Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 3 - Kinematics in Two Dimensions - Check Your Understanding - Page 66: 5



Work Step by Step

There is always a gravitational force acting on the projectile, so it always has an acceleration, and that is in the downward direction. If, hypothetically, it had a zero acceleration at the topmost point, it would never come back down.
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