You stand on a frictionless platform that is rotating at 1.3 rev/s. Your arms are outstretched,...
You stand on a frictionless platform that is rotating at 1.3 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 9.1 kg*m^2. When you pull the weights in toward your body, the moment of inertia decreases to 4.9 kg*m^s.
a. What is the resulting angular speed of the platform?
b. What is the change in kinetic energy of the system?
c. Where did this increase in energy come from?
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You stand on a frictionless platform that is rotating at 1.3
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