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A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity ω. Two objects each of mass m are attached gently to the opposite ends of a diameter of the ring. The ring will now rotate with an angular velocity

(a)  ω(M-2m) /(M+2m)

(b)  ωM/M+2m)

(c)   ωM/M+m

(d)  ω(M+2m)/M

Ans. b

(40)

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