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MHT CET 2019 (2 May, Shift 2) · Elastic Potential Energy

Elastic Potential Energy question from MHT CET 2019 (2 May, Shift 2)

Q10MHT CET 2019 · 2 MAY · SHIFT 2Easy

Elastic Potential Energy

A wire of length ' $L$ ' and area of cross section ' $A$ ' is made of material of Young's modulus ' $Y$ . It is stretched by an amount ' $x$ '. The work done in stretching the wire is

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Answer: (a)

Stretching force $F = \dfrac{YAx}{L}$ , and $W = \dfrac{1}{2}Fx$ .
$W = \dfrac{YAx^2}{2L}$
So the answer is (a).

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