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Mass is non- uniformly distributed on the circumference of a ring of radius a and centre at the origin. Let b be the distance of the centre of mass from the origin. Then

\[\begin {array} {1 1} (a)\;b=a & \quad (b)\;0 \leq b \leq a \\ (c)\;b < a & \quad  (d)\;b > a \end {array}\]

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If mass is uniformly distributed, Center Of Mass will be at origin.But center of mass of the ring can't be outside of the ring.
Hence b is the correct answer.
answered Nov 22, 2013 by meena.p
edited Jun 17, 2014 by lmohan717
 

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