Answer
Work Done $= 5.6$ $J$
Work Step by Step
$Work = F\times d$
Work done by collie's force = Force applied by collie $\times$ displacement of box
$= 8N\times 0.70 m$
$= 5.6$ $Joules$
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 8 - Potential Energy and Conservation of Energy - Problems - Page 206: 43a
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