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A wire suspended vertically from one of ...

A wire suspended vertically from one of its ends is stretched by attaching a weight of 100 N to its lower end. What is the elastic potential energy stored in the wire, if the weight stretches the wire by 1.5 mm ?

A

`5 xx 10^(-2) J`

B

`10^(-3) J`

C

`2.5 xx 10^(-3) J`

D

`7.5 xx 10^(-2) J`

Text Solution

Verified by Experts

The correct Answer is:
D
Elastic potential energy = Work done
`= (1)/(2) xx "load" xx "extension" = (1)/(2) xx 10-0 xx 1.5 xx 10^(-3)`
`= 7.5 xx 10^(-2) J`
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