Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 15 - Exercises and Problems: 46

Answer

The answer is below.

Work Step by Step

We find: a) $ W_{app} = W(1 - \frac{P_w}{P_c}) = 25(1-\frac{1}{19.3})=23.7\ N$ b) $\frac{P_c}{P_w} = (.75)(19.3) + (10.5)(.25) = 17.1$ $ W_{app} = W(1 - \frac{P_w}{P_c}) = 25(1-\frac{1}{17.1})=23.5\ N$
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