Conceptual Physics (12th Edition)

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

Chapter 7 - Think and Solve: 49

Answer

Power = $\frac{Fd}{t} = \frac{(50N)(8m)}{4 s} = \frac{100J}{1 s} = 100 watts$.
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