question_answer

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                                                                                                                       [AIEEE 2011]

A) \[\frac{g}{3}\]   

B)                    \[\frac{3}{2}g\]

C)   g        

D)                    \[\frac{2}{3}g\]

Correct Answer: D

Solution :

[d]