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A mass 'm' kg is whirled in a vertical ...

A mass `'m' kg` is whirled in a vertical plane by tying it at the end of a flexible wire of length `'L'` and area of cross-section `'A'` such that it just completes the vertical circle. When the mass is a its lowest positon, the strain produced in the wire is (Young's modulus of the wire is `'Y'`)

A

`(AY)/(6mg)`

B

`(6mg)/(AY)`

C

`(5mg)/(AY)`

D

`(AY)/(5mg)`

Text Solution

Verified by Experts

The correct Answer is:
B
`y=(FL)/(Al) " " l=(FL)/(Ay)`
`(l)/(L)=(6mg)/(Ay)`
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