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A stone tied to a string is rotated with...

A stone tied to a string is rotated with a uniform speed in a vertical plane. If mass of the stone is `m`, the length of the string is `r` and linear speed of the stone is `v` when the stone is at its lowest point, then the tension in the string will be
(g= acceleration due to gravity)

A

`(mv^(2))/r+mg`

B

`(mv^(2))/r-mg`

C

`(mv^(2))/r`

D

`mg`

Text Solution

Verified by Experts

The correct Answer is:
A
`T-mg=(mv^(2))/r` (centripetal force at lowest point)
`T=(mv^(2))/r+mg`
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