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Rotational Motion question

2018 · Q144
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Rotational Motion question

2018 · Q144

NEETPhysicsRotational MotionMCQ+4 / −1
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?
  1. A
    Angular velocity
  2. B
    Moment of inertia
  3. C
    Rotational kinetic energy
  4. D
    Angular momentum
View written solutionFree

Correct answer: D

As sphere is in free space and no external torque is acting over it so its angular momentum will remain constant.

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