College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 5 - Work and Energy - Learning Path Questions and Exercises - Exercises - Page 176: 43

Answer

$18J$

Work Step by Step

Considering that the bottom most book does not need any work, because it is already on the surface. Work to be done for the rest 5 books. So, minimum work to be done $=w\times (0.04+0.08+0.12+0.16+0.2)=30\times0.6=18J$
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