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K is the force constant of a spring. The...

K is the force constant of a spring. The work done in increasing its extension from `l_(1)` to `l_(2)` will be

A

`K(l_(2)-l_(1))`

B

`(K)/(2)(l_(2)+l_(1))`

C

`K(l_(2)^(2)-l_(1)^(2))`

D

`(K)/(2)(l_(2)^(2)-l_(1)^(2))`

Text Solution

Verified by Experts

The correct Answer is:
D
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