# Calculate the Strain Energy per Unit Volume is a Brass Wire of Length 3 M and Area of Cross - Section 0.6 Mm2 When It is Stretched by 3 Mm and a Force of 6 Kgwt is Applied to Its Free End - Physics

Numerical

Calculate the strain energy per unit volume is a brass wire of length 3 m and area of cross - section 0.6 mm2 when it is stretched by 3 mm and a force of 6 kgwt is applied to its free end.

#### Solution

Data : L = 3m

A = 0.6 mm2 = 0.6 × 10-6 m2

l = 3 mm = 3 × 10-3 m

F = 6 kg-wt = 6 × 9.8 N

Formula:

"Strain Enegry"/"Volume" = 1/2 (F/A) xx (1/L)

= 1/2 ((6xx9.8)/(0.6 xx 10^(-6)))xx((3xx10^(-3))/3)

= 4.9 xx 10^(4)" J/m"^3

Concept: Definition of Stress and Strain
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