16. Angular Momentum
16. Angular Momentum / Opening/Closing Arms on Rotating Stool / Problem 13
A figure skater has her arms extended outwards at her sides, while spinning at a rate of 1.2 rev/s. If she pulls her arms close to her body, the rotation speed will increase to 1.8 rev/s.
(a) Why does the rotation speed increase?
(b) Express her final moment of inertia in terms of her initial moment of inertia.
Was this helpful?
Learn this concept