On stretching a wire, the elastic energy stored per unit vol... | PHYSICS - ELASTIC MODULI | SolveeIt | Solveeit

Today, August 19

Question

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

A

$F l / 2 A L$

B

$F A / 2 L$

C

D

$F L / 2$

Answer

$F l / 2 A L$

Explanation

Solution

Energy stored per unit volume

= $\frac { 1 } { 2 } \left( \frac { F } { A } \right) \left( \frac { l } { L } \right)$ = $\frac { F l } { 2 A L }$