A solid cylinder of mass 50 kg and radius 0.5 
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 
is
A
25 
B
50 
C
78.5 
D
157 
Text Solution
Verified by ExpertsThe correct answer is:
D
Here, mass of the cylinder, 
kg
Radius of the cylinder, 
Angular acceleration, 
rev 
rad 
rad 
Torque, 
Moment of inertia of the solid cylinder about its axis, 
Angular acceleration of the cylinder
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