Q .     A point mass `m` is suspended at the end of massless wire of length `L` and cross-sectional area `A`. If `Y` is the Young’s modulus of elasticity of the material of the wire, obtain the expression for the frequency of the simple harmonic motion along the vertical line.

JEE 1978
A

`1/(2π)sqrt((YA)/(mL))`

B

`1/(2π)sqrt((YA)/(2mL))`

C

`1/(2πsqrt((2YA)/(mL))`

D

`1/2 sqrt((YA)/(mL))`

HINT

Force constant of a wire K `= (YA)/L`

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