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A horizontal disc rotates freely with an...

A horizontal disc rotates freely with angular velocity `omega` about a vertical axes through its centre. A ring having the same mass and radius as the disc, is now gently placed coaxially on the disc. After some time, the two rotate with a common angular velocity. then.

A

`E//2`

B

`(2E)//5`

C

`E//5`

D

`E//3`

Text Solution

Verified by Experts

The correct Answer is:
C
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