A horizontal platform in the shape of a circular disk
Chapter , Problem 58(choose chapter or problem)
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axle through the center of the disk. The platform has a mass of 150 kg, a radius of 2.0 m, and a rotational inertia of 300 kg"m2 about the axis of rotation.A 60 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.5 rad/s when the student starts at the rim,what is the angular speed when she is 0.50 m from the center?
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