(Solved): Question 2 - A figure skater rotating at \( 5.00 \mathrm{rad} / \mathrm{s} \) with arms extended. ...

Question 2 - A figure skater rotating at \( 5.00 \mathrm{rad} / \mathrm{s} \) with arms extended. If he pulls in his arms, the speed of rotation increases to \( 6.25 \mathrm{rad} / \mathrm{s} \). (a) By what factor has his moment of inertia changed? (b) By what factor has his rotational kinetic energy changed?