Mistake Master · AP Physics C · Unit 6 · Topic 6.4 · Step-Through Animation
Arms In, Spin Up — One Number Refuses to Move
A skater spins slowly on frictionless ice, arms flung wide. She hauls them in and whirls faster — no push, no engine. Her angular momentum never budges, yet her kinetic energy triples. Two ledgers, two verdicts.
ROTATION LAB
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