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Longitudinal Strain

The length of...

Question

The length of a wire increases by $1$ % on loading a $2 k g$ weight on it. Calculate the linear strain in the wire.

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Solution

The linear strain is $\frac{l}{L}$ where $l$ is change in length and $L$ is original length .
It is given that $l = \frac{1}{100} \times L$ or $l = .01 L$
so strain is $\frac{.01 L}{L}$ = $.01$

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