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 subject

1.	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
Answer» E.

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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

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