(Solved): An ice skater doing a spin pulls in her arms, decreasing her moment of inertia by a factor of two. ...

An ice skater doing a spin pulls in her arms, decreasing her moment of inertia by a factor of two. How does her angular speed changes? It is reduced by a factor of two. It is reduced by a factor of four. It increases by a factor of two. It increases by a factor of four.