Question

In a wire stretched by hanging a weight from its end, the elastic potential energy per unit volume in terms of longitudinal strain s and modulus of elasticity Y is -

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

Answer 2

Energy density = $\frac { 1 } { 2 }$ × stress × strain,

Y = or stress = Ys ,

\ Energy density = $\frac { 1 } { 2 }$Ys × s =