A wire of area of cross - section \(3 \text{ mm}^2\) and natural length \(50 \text { cm}\) is fixed at one end and a mass of \(2.1 \text { kg}\) is hung from the other end. Find the elastic potential energy (in joules) stored in the wire in steady state.

Young's modulus of the material of the wire = \(1.9 \times {10}^{11} \text{ Nm}^{-2}\).

Take \(g = 10 \text{ ms}^{-2}\).

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