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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 the plane with angular velocity `omega`. Another disc of same mass but half the radius is gently placed over it coaxially. The angular speed ofthe composite disc will be:

A

`5 omega//4`

B

`4 omega//5`

C

`2 omega//5`

D

`5omega//2`

Text Solution

Verified by Experts

The correct Answer is:
B
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