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A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is

A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is Correct Answer $$\frac{{{{\text{W}}^2}{\text{L}}}}{{2{\text{AE}}}}$$

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