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

A uniform disc of mass `M` and radius `R` is mounted on an axle supported in frictionless bearings. A light cord is wrapped around the rim of the disc and a steady downward pull `T` is exerted on the cord. The angular acceleration of the disc is

A

`(T)/(MR)`

B

`(MR)/(T)`

C

`(2T)/(MR)`

D

`(MR)/(2T)`

Text Solution

Verified by Experts

The correct Answer is:
C
`TR=(MR^(2))/(2) prop rArr prop = (2T)/(MR)`
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