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A 5 metre long wire is fixed to the ceil...

A 5 metre long wire is fixed to the ceiling. A weight of `10kg` is hung at the lower end and is `1metre` above the floor. The wire was elongated by `1mm`. The energy stored in the wire duw to streching is

A

zero

B

`0.05joule`

C

`100joule`

D

`500joule`

Text Solution

Verified by Experts

The correct Answer is:
B
`W=(1)/(2)xxFxxL=(1)/(2)mgl`
`=(1)/(2)xx10xx10xx1xx10^-1=0.05J`
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