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A string of length L and force constant ...

A string of length L and force constant k is stretched to obtain extension l. It is further stretched to obtain extension `l_(1)`. The work done in second streching is

A

`1/2Kl_1(2l+l_1)`

B

`1/2 Kl_1^2`

C

`1/2 K(l^2+l_1^2)`

D

`1/2 K(l_1^2-l^2)`

Text Solution

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The correct Answer is:
A
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