Question
Physics Question on System of Particles & Rotational Motion
A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which one of the following will not be affected ?
A
Angular velocity
B
Angular momentum
C
Moment of inertia
D
Rotational kinetic energy
Answer
Angular momentum
Explanation
Solution
Taking the same mass of sphere if radius is increased then moment of inertia, angular velocity and rotational kinetic energy will change but according to law of conservation of momentum, angular momentum will not change.