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A uniform rod of mass m is hinged at one...

A uniform rod of mass m is hinged at one end and other end is connected to a light extensible string having length L.If the Young`s modulus and crosssectional area of the wire is Y and A respectively then the elongation in the string is

A

`(mgL)/(AY)`

B

`2(mgL)/(AY)`

C

`(mgL)/(2AY)`

D

`(mgL)/(4AY)`

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