Categories > rotational-motion > angular momentum > 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 same dimension but of mass M/4 is placed gently on the first disc coaxially. The angular velocity of the system now is

rotational-motion

Question: 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 same dimension but of mass M/4 is placed gently on the first disc coaxially. The angular velocity of the system now is


1) $2\omega /5$
2) $2\omega /\sqrt{5}$
3) $4\omega /5$
4) $4\omega /\sqrt{5}$
Solution: Explanation: No Explanation
angular momentum

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