University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 7 - Potential Energy and Energy Conservation - Problems - Exercises - Page 236: 7.84

Answer

The correct answer is (a). The graph is a straight line through the origin.

Work Step by Step

Hooke's law applies to DNA $F=kx$ and power at constant speed is $P=Fv$ and $x=vt$. So $P= Fv=kxv=kv^2t$. $k$ and $v$ are constants so the power is proportional to the time. The graph should be a straight line.
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