A solid cylinder of mass 50 kg and radius 0.5 m is free to rotate about the horizontal axis. A massless string is would round the cylinder with one end attached to it and other hanging freely. Tension in the sting required to produce an angular acceleration of 2 revolutions s-2 is

Q: A solid cylinder of mass 50 kg and radius 0.5 m is free to rotate about the horizontal axis. A massless string is would round the cylinder with one end attached to it and other hanging freely. Tension in the sting required to produce an angular acceleration of 2 revolutions s^-2 is

(a) 78.5 N

(b) 157 N

(c) 25 N

(d) 50 N

Ans: (b)