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A circular ring of radius R and mass m m...

A circular ring of radius `R` and mass `m` made of a uniform wire of cross sectional area `A` is rotated about a stationary vertical axis passing throgh its centre and perpendicular to the plane of the ring. If the breaking stress of the material of the ring is `sigma_(b)`, then determine the maximum angular speed `omega_("max")` at which the ring may be rotated without failure.

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