Angular Momentum: An ice skater has a moment of inertia of 5.0 kg ? m2 when her arms are outstretched, and at this time she is spinning at 3.0 rev/s. If she pulls in her arms and decreases her moment of inertia to 2.0 kg ? m2, how fast will she be spinning?
A. 2.0 rev/s
B. 3.3 rev/s
C. 7.5 rev/s
D. 10 rev/s
Answer: C
Physics & Space Science
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