Figure 7.22b shows the potential energy function associated with the gravitational force between an object and the

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Figure 7.22b shows the potential energy function associated with the gravitational force between an object and the earth. Use this graph to explain why objects always fall toward the earth when they are released.

Figure 7.22b

Gravitational potential energy and force as functions of y

F, Potential energy For all y, F, < 0; force pushes body toward decreasing y. decreases as y decreases. -mg dy U = mgy F

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University Physics with Modern Physics

ISBN: 978-0133977981

14th edition

Authors: Hugh D. Young, Roger A. Freedman

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