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A stone is tied to a string of length `L` and is whirled in a vertical circle with the other end of the string as the center. At a certain instant of time, the stone is at its lowest position and has a speed `u`. The magnitude of the change in velocity as it reaches a position where the string is horizontal (g being acceleration due to gravity) is

A

`sqrt(u^(2) - 2gL)`

B

`sqrt(2gL)`

C

`sqrt(u^(2) - gL)`

D

`sqrt(2(u^(2) - gL))`

Text Solution

Verified by Experts

The correct Answer is:
D
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