Conceptual Physics (12th Edition)

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

Chapter 10 - Think and Solve: 26

Answer

You are correct.

Work Step by Step

The horizontal component of velocity remains constant, 10 m/s. The initial vertical velocity component was initially zero, and after one second, the vertical component is 10 m/s directed downward. Use the Pythagorean theorem to find the overall speed. $$(10 \frac{m}{s})^{2}+(10 \frac{m}{s})^{2} =v^{2}$$ $$v=14.1 \frac{m}{s} $$ The ball is moving at an angle of 45° below the horizontal. This is discussed on page 184.
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