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 subjecte

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.	<img src="/_files/images/civil-engineering/theory-of-structures/83-21-29-1.png">
B.	<img src="/_files/images/civil-engineering/theory-of-structures/83-21-29-2.png">
C.	<img src="/_files/images/civil-engineering/theory-of-structures/83-21-29-3.png">
D.	<img src="/_files/images/civil-engineering/theory-of-structures/83-21-29-4.png">
Answer» E.