Mathematica(@mathemetica):Why do figure skaters spin faster when they pull their arms in? It's all due to the Conservation of Angular Momentum. L = I × ω When the skater pulls their arms in, their Moment of Inertia (I) decreases dramatically. Because angular momentum (L) must remain constant (no external torque), their angular velocity (ω) increases to compensate: causing them to spin much faster.

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Mathematica@mathemetica

2026.05.13 08:21

Why do figure skaters spin faster when they pull their arms in? It's all due to the Conservation of Angular Momentum. L = I × ω When the skater pulls their arms in, their Moment of Inertia (I) decreases dramatically. Because angular momentum (L) must remain constant (no external torque), their angular velocity (ω) increases to compensate: causing them to spin much faster.