Question

Derive an expression for energy stored in a stretched wire per unit volume

Answer 1

In order to find the formula for elastic potential energy of a spring we need to look at Hooke's law, which states that the force needed to stretch a spring is proportional to the displacement of the spring. Mathematically this is expressed as F = kx, where x is the displacement and k is the spring constant.

Answer 2

see the attachement..

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