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An object of mass m is tied to a string ...

An object of mass `m` is tied to a string of length `l` and a variable force F is applied on it which brings the string gradually at angle thit `theta` with the vertical. Find the work done by the force `F`
.

A

`mgL(1-sin theta)`

B

mgL

C

`mgL(1-cos theta)`

D

`mgL(1+cos theta)`

Text Solution

Verified by Experts

The correct Answer is:
C
(c ) W=change in potential energy =mgh`=mgL(1-cos theta)`
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