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 radius of 3.54 m and a rotational inertia of 138 kg·m2 about the axis of rotation. A 63.6 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.86 rad/s when the student starts at the rim, what is the angular speed when she is 2.30 m from the center?

The expression for the final angular speed from the conservation of momentum,

Answered: A horizontal platform in the shape of a…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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 radius of 3.54 m and a rotational inertia of 138 kg·m² about the axis of rotation. A 63.6 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.86 rad/s when the student starts at the rim, what is the angular speed when she is 2.30 m from the center?

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