File talk:Coriolis effect13.gif

It is interesting frame and I wanted to use it in my wikibooks project, but I have problem understanding the descryption. What does it mean that 'the increase in rotational energy is absorbed in the form of an increase of the moment of inertia rather than in the form of an increase in angular velocity'? It does spin faster, doesn't it? And what do does it mean that there is an increase in a moment of interia? I though that this two are similar (the angular velocity and moment of interia).