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_________________?

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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. WL/2AE
B. WL/AE
C. W²L/AE
D. W²L/2AE(Correct)