A solid cylinder of mass 50 Kg and radius 0.5 m is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions s-2 is :
25 N
50 N
78.5 N
157 N
As learnt in @7077
Torque by Tension in string
Option 1)
25 N
This solution is incorrect.
Option 2)
50 N
This solution is incorrect.
Option 3)
78.5 N
This solution is incorrect.
Option 4)
157 N
This solution is correct.