suppose an ice skater, is spinning at 0.800 rev/ s with her arms extended. she has a moment of inertia of with her arms extended and of with her arms close to her body. (these moments of inertia are based on reasonable assumptions about a 60.0-kg skater.) (a) what is her angular velocity in revolutions per second after she pulls in her arms? (b) what is her rotational kinetic energy before and after she does this?