Potential energy and displacement curve is given in diagram.The force at $x = 5 m$ is

2.5 N

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10 N

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- 10 N

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Zero

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Solution

The correct option is C $- 10 N$
We know that force,
$F = \frac{- d v}{d x}$
which is nothing but the slope,
$S l o p e = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}$
$= \frac{0 - 10}{6 - 5} = - 10$
but $F = - (+ s l o p e) = 10 N$

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