Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 6 - Work and Energy - Problems: 1

Answer

$2.06 \times 10^4 J$.

Work Step by Step

The firefighter exerts an upward force equal to his weight. The force and the displacement are both straight upward. The angle between them is 0 degrees. Use equation 6–1. $$W=(75.0 kg)(9.80 \frac{m}{s^2})(28.0 m)(cos 0^{\circ})=2.06 \times 10^4 J$$
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