University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 6 - Work and Kinetic Energy - Problems - Exercises - Page 197: 6.50

Answer

P = 378 W

Work Step by Step

At t = 5.00 s: $v = at = (2.80~m/s^2)(5.00~s) = 14.0~m/s$ $F = (5.40~N/s)(5.00~s) = 27.0 ~N$ We can use the force and the speed to find the power. $P = F~v = (27.0~N)(14.0~m/s)$ $P = 378~W$
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