A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere ?
- Angular momentum
- Angular velocity
- Rotational kinetic energy
- Moment of inertia
The Correct Option is A
Solution and Explanation
So, $\frac{dL}{dt} = 0 $
i.e. $L = $ constant
So angular momentum remains constant.
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