. A solid sphere is rotating in free space

 If the radius of the sphere is increased keeping mass samewhich one of the following will not be affected?

A: Moment of inertia

B: Angular momentum

C: Angular velocity

D: Rotational kinetic energy


Best Answer


  • In free space, a solid sphere rotates.
  • Because there is no external tension, angular momentum will be conserved. 
  • As r varies, the moment of inertia will vary as.1= 2/5 mr2
  • As,1ω =constant the angular velocity will vary.
  • As 1/21ω2, rotational kinetic energy will also vary.

Final Answer

The correct option is B i.e Angular momentum.


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