A skater spins with an angular speed of 17.9 rad/s with his arms outstretched. He lowers his arms, decreasing his moment of in- ertia from 41 kg·m2 to 41 kg·m2.
a) Calculate his initial rotational kinetic energy.
Answer in units of J.
009 (part 2 of 2) 10.0 points
b) Calculate his final rotational kinetic en- ergy.
Answer in units of J.
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