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A copper wire of negligible mass, length...

A copper wire of negligible mass, length l and corss-section A is kept on a smooth horizontal table with one end fixed. A ball of mass m is attached to the other end. The wire and the ball are rotating with an angular velocity `omega`. If elongation in the wire is `Deltal`, obtain the expression for the Young's modulus.

A

`(mL^(2)omega)/(ADeltaL)`

B

`(m omega^(2)L^(2))/(A DeltaL)`

C

`(momega^(2)L)/(A DeltaL)`

D

`(m omegaL)/(A DeltaL)`

Text Solution

Verified by Experts

The correct Answer is:
B
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