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An ice skater spins faster and faster simply by doing what?
APushing her arms out
BBending her knees down
CTilting her head back
DPulling her arms in
Answer & Solution
Correct answer: D. Pulling her arms in
1. The skater changes her own mass distribution.
2. Rotational inertia depends on the distribution of mass.
3. The question asked is how an ice skater manages to spin faster and faster.
4. She does so simply by pulling her arms in.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 10 'Rotational Motion and Angular Momentum', sections 10.1-10.7_
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