Question

A wire fixed at the upper end
stretches by length l by
applying
a force F. What is the
work done in
stretching the
wire ?​

Answer 1

Explanation:

Answer

Let the area be A and length L of the string then the work done by the force is :

W=

2

1

×stress×strain×volume=

2

1

×

A

F

×

L

l

×A×L=

2

Fl