Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 9 - Work and Kinetic Energy - Exercises and Problems: 33

Answer

$\mu_k = 0.037$

Work Step by Step

The work done by friction is equal in magnitude to the initial kinetic energy of the suitcase; $W_f = KE$ $F_f~d = \frac{1}{2}mv^2$ $mg~\mu_k~d = \frac{1}{2}mv^2$ $\mu_k = \frac{v^2}{2~g~d}$ $\mu_k = \frac{(1.2~m/s)^2}{(2)(9.80~m/s^2)(2.0~m)}$ $\mu_k = 0.037$
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