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The force constant of a wire is K. What ...

The force constant of a wire is K. What is the work done in increasing the length of the wire by l ?

A

Kl

B

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

C

`K l^(2)`

D

`(K)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`because K = (F)/(l) :. F = Kl`
`:.` Work done `= (1)/(2) F xx l = (1)/(2) Kl xx l = (1)/(2) Kl^(2)`
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