Calculate the work done, if a wire is loaded by $Mg$ weight and the increase in length is $l$.

When a weight $Mg$ is suspended from a wire of length $L$,the increase in length is $l$ meters. The energy stored in the wire is:

The elastic energy stored in a wire of Young's modulus $Y$ is

Determine the elastic potential energy stored in a stretched wire.

On stretching a wire,the elastic energy stored per unit volume is

The work done in increasing the length of a $1 \ m$ long wire of cross-section area $1 \ mm^2$ by $1 \ mm$ will be ....... $J$ $(Y = 2 \times 10^{11} \ Nm^{-2})$