AP Physics 1mediummcq1 pt
A spinning figure skater has I = 4.0 kg·m² and ω = 3.0 rad/s. She pulls in to I = 1.0 kg·m². Her new angular velocity is
A.12 rad/s
B.3.0 rad/s
C.0.75 rad/s
D.9.0 rad/s
Explanation
Core Concept
L conserved: (4.0)(3.0) = (1.0)ω, so ω = 12 rad/s.
Correct Answer
A12 rad/s
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