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A uniform rod of length 2a is held with ...

A uniform rod of length 2a is held with one end resting on a smooth horizontal table making an angle a with the vertical. Show that when the rod is released, its angular velocity when it makes an angle `theta` with the vertical is given by
`omega=[(6g(cosalpha-costheta))/((1+3sin^(2)alpha))]`

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