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A uniform disc of mass M and radius R is...

A uniform disc of mass M and radius R is rotating in a horizontal plane about an axis perpendicular to its plane with an angular velocity `omega`. Another disc of mass M/3 and radius R/2 is placed gently on the first disc coaxial. Then final angular velocity of the system is

A

`12omega//13`

B

`13omega//12`

C

`3omega//4`

D

`11omega//12`

Text Solution

Verified by Experts

The correct Answer is:
A

`I_(1)omega_(1)=I_(2)omega_(2)`
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