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A ring, a solid sphere and a thin disc o...

A ring, a solid sphere and a thin disc of different masses rotate with the same kinetic energy. Equal torques are applied to stop them. Which will make the least number of rotations before coming to rest?

A

Disc

B

Ring

C

Solid sphere

D

All will make same number of rotations

Text Solution

Verified by Experts

The correct Answer is:
D
As `W= tau theta=` Energy `rArr theta= ("Energy")/(tau)= 2n pi`
So, if energy and torque are same then all the bodies will make same number of rotation
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