What is the turntables angular velocity after junior walks

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Junior has mass M and stands on a frictionless turntable. The turntableis a uniform disk of radius R and mass m. Initially, the turntable rotates with angular velocity omega not with junior standing at the rim of the turntable. What is the turntable's angulat velocity after Junior walks to the center of the turnatble?

Reference no: EM13547853

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