Give the expression for work done per unit volume in stretching a wire.

Work done per unit volume is stretching a wire

The work done per unit volume in stretching a wire is equal to

The work done per unit volume in stretching the wire is equal to

Give the expression for work done by the gas .

Work done per unit time

Define Strain Energy. Derive expressions for (i) work done per unit volume (ii) Strain energy per unit volume. OR Derive an expression for strain energy per unit volume of the material of a wire.

Give the expression for work done by a variable force.