Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 10 - Think and Explain: 51

Answer

0 m/s. 100 m/s.

Work Step by Step

Any projectile launched straight upward has zero velocity at the very top of its flight. When it fired at an angle, at the very top, the vertical component of velocity is zero and the velocity equals the (constant) horizontal component of velocity, 100 m/s in this case. See Figure 10.9.
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