Physics - Mechanics - Rotational Motion - Angular momentum - The Spinning Skater

Show a figure skater spinning. Ask: 'The skater starts spinning with arms out, then pulls arms in. What happens?' (A) Spins faster, (B) Spins slower, (C) No change, (D) Stops. Answer: Spins faster! Then ask: 'Why? What was conserved?' Show that angular momentum L = Iω stays constant. Arms in → I dec