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(A) When an elastic spring is stretched or compressed,work is done against the restoring force of the spring. According to the work-energy theorem,the

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(A) When an elastic spring is stretched or compressed,work is done against the restoring force of the spring. According to the work-energy theorem,the work done by an external agent is stored in the spring in the form of elastic potential energy. The potential energy of a spring is given by $U = \frac{1}{2} k x^2$,where $k$ is the spring constant and $x$ is the displacement from the equilibrium position. Since the potential energy depends on the square of the displacement $(x^2)$,any displacement (whether stretching or compressing) results in an increase in potential energy.

When an elastic spring is stretched or compressed,does its potential energy increase or decrease?

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