Answer
$1200N$
Work Step by Step
$F_{fric}=\mu mg=0.4\times 300\times 10=1200N$
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 209: 78b
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