Q.

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

 

  • AWL/2AE 
  • BWL/AE 
  • CW²L/AE 
  • DW²L/2AE 
Correct Answer : (D)

W²L/2AE

 

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