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A thin uniform circular disc of mass M a...

A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane with an angular velocity `omega`. Another disc of the same dimension but of mass M/4 is placed gently on the first disc coaxially. Show that the angular momentum of the system is `(4)/(5)omega`.

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A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane with an angular velocity omega . Another disc of the same dimensions but of mass M//4 is placed gently on the first disc co-axially. show that angular velocity o fthe system is 4 omega//5 .

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