Answer
$E_f = 25J$
Work Step by Step
$E_f = $ thermal energy of floor
$E_c = $ thermal energy of cube
$W= $ Work done by force
$E_f = W - E_c$
$E_f = Fd - E_c$
$E_f = (15N \times 3m) - 20J$
$E_f =45J - 20J$
$E_f = 25J$
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 208: 73
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