Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 7 - Kinetic Energy and Work - Problems - Page 174: 55b

Answer

The average power of the force is $~~0.55~hp$

Work Step by Step

In part (a), we found that the work done by the force in ten minutes is $~~(1.83\times 10^5)~ft\cdot lb$ We can find the average power: $P = \frac{Work}{t}$ $P = \frac{(1.83\times 10^5)~ft\cdot lb}{600~s}$ $P = 305~ft\cdot lb/s$ $P = (305~ft\cdot lb/s)\times (\frac{1~hp}{550~ft\cdot lb/s})$ $P = 0.55~hp$ The average power of the force is $~~0.55~hp$.
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