11. A figure skater is spinning at 4.85 rad/s when his moment of inertia is 1.60...
11. A figure skater is spinning at 4.85 rad/s when his moment of inertia is 1.60 kg·m2. How much work does he do in decreasing his moment of inertia to 1.20 kg·m2? a) 6.27 J b) 5.27 J c) 5.76 J d) 4.34 J e) 3.48 J
Homework Answers
Concept - first use conservation of angular momentum to find the final angular speed and then use work energy theorem to find the work done as shown below,
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11. A figure skater is spinning at 4.85 rad/s when his moment of
inertia is 1.60...
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