Question

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))`

Answer 1

Correct Answer - C
`TR=(MR^(2))/(2)alpha,alpha=((2T)/(MR))`