You stand on a frictional platform that is rotating at 1.8 rev/s. your arms are outstretched, and you hold a heavy weight in each hand. the moment of inertia of you, the extended weights, and the platform is 9.3 kg * m^2. when you pull the weights in toward your body, the moment of inertia decreases to 5.1 kg * m^2.
(a) whatis the resulting angular speed of the platform?
(b) what is thechange in kinetic energy of the system?
(c) where did thisincrease in energy come from?
Answers: 2
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