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Young's Modulus of Elasticity

Calculate the...

Question

Calculate the work done, if a wire is loaded by 'Mg' weight and the increase in length is 'l'

A

Mgl

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B

Zero

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C

\frac{M g l}{2}

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D

2Mgl

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Solution

The correct option is C $\frac{M g l}{2}$
Work done = $\frac{1}{2} F l = \frac{M g l}{2}$

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