1.

A thin circular ring of mass M and radius R is rotating about its central axis with angular velocity omega. Four point objects each of mass m are attached gently to the opposite ends of two perpendicular diameters, the angular velocity of the ring is given by :

Answer»

`(M)/(M+m).omega`
`(M)/(M+4m).omega`
`(M+4m)/(M).omega`
`(M-4m)/(M+4m).omega`

Solution :`I_(1)omega_(1)=I_(2)omega_(2)IMPLIES MR^(2)omega=(M+4m)R^(2)omega_(2)`
implies `omega_(2)=(Momega)/(M+4m)`


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