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When a particle of mass m is attached to...

When a particle of mass m is attached to a vertical spring of spring constant k and released, its motion is described by `y (t) = y_0 sin^2omegat`, where 'y' is measured from the lower end of unstretched spring. Then `omega` is :

A

`1/2sqrt(g/y_0)`

B

`sqrt(g/(y_0)`

C

`sqrt(g/(2y_0))`

D

`sqrt((2g)/y_0)`

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