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

K is the force constant of a spring. The work donein increasing its ex

1.	K is the force constant of a spring. The work donein increasing its extension from `l_(1)` to `l_(2)` will beA. `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))`
Answer» Correct Answer - D

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

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