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A stone tied to a string of length L is ...

A stone tied to a string of length `L` is whirled in a vertical circle with the other end of the string at the centre. At a certain instant of time the stone is at lowest position and has a speed `u` . Find the magnitude of the change in its velocity as it reaches a position, where the string is horizontal.

A

`sqrt(u^2-2gl`

B

`sqrt(2gL`

C

`sqrt(u^2-gL`

D

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

Text Solution

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