A mass … hangs with the help of a string wrapped around a pulley on a frictionless bearing. The pulley has mass … and radius … Assuming pulley to be a perfect uniform circular disc, the acceleration of the mass … if the string does not slip on the pulley, is:

Option B. This is the free body diagram of pulley and mass

Rotational Motion

JEE Main 2011 · Annual, Paper 1 · Q8066

PhysicsMedium49×since 2002Q8066

A mass

m

hangs with the help of a string wrapped around a pulley on a frictionless bearing. The pulley has mass

m

and radius

R.

Assuming pulley to be a perfect uniform circular disc, the acceleration of the mass

m,

if the string does not slip on the pulley, is: