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A particle is rotated in a vertical circ...

A particle is rotated in a vertical circle by connecting it to a string of length I and keeping the other end of the string fixed. The minimum speed of the particle when the string is horizontal for wich the particle will complete the circle is

A

`sqrt(gl)`

B

`sqrt(2gl)`

C

`sqrt(3gl)`

D

none

Text Solution

Verified by Experts


`(1)/(2)mv^(2)+mgl=(1)/(2)mu^(2)`, for `u_(min)v=0`
`u_(min)=sqrt(2gl)`
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