Physics-
General
Easy
Question
A ring of mass 100 kg and diameter 2m is rotating at the rate of 
rpm. Then-
- moment of inertia is 100 kg – m2
- kinetic energy is 5 kJ
- if a retarding torque of 200 N-m starts acting then it will come at rest after 5 sec.
- all of these
The correct answer is: all of these
Moment of inertia = MR2
k.E of rotation = 
I2
Torque = I where = 
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