To find the force from potential energy on a graph, if the potential energy function U(x) is known, then the force at any position can be obtained by:

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adding up all the potential

taking the derivative of the potential

product of potential and position

taking the integral of the potential

answer is B.

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Detailed Solution

If the potential energy function U(x) is known, then the force at any position can be obtained by taking the derivative of the potential.

The work done against conservative force is stored in the form of potential energy.

The change in the potential energy of a body is equal to the negative of the work done by conservative force.

$F = - \frac{d U}{d x}$

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