#### Answer

c

#### Work Step by Step

We know that the force is 0 when the slope of the potential energy curve is 0, since $F = \frac{dP}{dt}.$ Thus, we see that the force is 0 at approximately 5 fm.

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Published by
Pearson

ISBN 10:
0-134-98855-8

ISBN 13:
978-0-13498-855-9

c

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