Fundamentals of Physics Extended (10th Edition)

by Halliday, David; Resnick, Robert; Walker, Jearl

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: 53a

Answer

1.32J

Work Step by Step

d = 24cm = 0.24m F1 = 6N F2 = 4N F3 = 7N θ3 = 60˚ WF1 = 6(0.24)cos0 = 1.44 WF2 = 4(0.24)cos180 = -0.96 WF3 = 7(0.24)cos60 = 0.84 thus add work together = 1.44 - 0.96 + 0.84 = 1.32J

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