Answer
Please see the work below.
Work Step by Step
(a) We know that
$W=\mu mg(2L) =2\mu mgL$
(b)$W=\mu mg(\sqrt2 L)=\sqrt 2 \mu mgL$
Essential University Physics: Volume 1 (3rd Edition)
by Wolfson, Richard
Published by
Pearson
ISBN 10:
0321993721
ISBN 13:
978-0-32199-372-4
Chapter 7 - Exercises and Problems - Page 125: 10
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