Question

Find strain energy stored per unit volume in copper wire of uniform cross section and by length 3m

when it is stretched to length of 3.1 m by a stress 600 N/m²​

Answer 1

Answer:

Energy stored per unit volume =  

2

1

​  

×stress×strain

Stress=3×10  

2

N/m  

2

 

Strain=  

l

△l

​  

=  

1.5

0.01

​  

=

=  

2

1

​  

×3×10  

2

×  

1.5

0.01

​  

=1J/m  

3

 

Explanation: