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A wire extends by 'l' on the application...

A wire extends by `'l'` on the application of load `'mg'`. Then the energy stored in it is

A

2 Mg l

B

Mg l

C

`(Mgl)/(2)`

D

`(Mgl)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
Weight Mg moves moves the centre of gravity of the spring through a distace `(0+l)/(2)=l//2`
`therefore` Mechanical energy stored =Work done=Mg l/2.
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