Fundamentals of Physics Extended (10th Edition)

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: 52b

Answer

$K = 14.13$ $J$

Work Step by Step

The cookie transfers its spring energy to thermal and kinetic energy as it slides back $E_s = K + E_{th}$ $-K = E_{th} - E_s $ $K = E_s - E_{th}$ $K = \frac{1}{2}kx^2 - fx$ $K = (\frac{1}{2}\times 400(0.292)^2) -( 10\times 0.292)$ $K = 17.05 - 2.92$ $K = 14.13$ $J$
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