Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter13: Rotation Ii: A Conservation Approach
Section: Chapter Questions
Problem 49PQ: A turntable (disk) of radius r = 26.0 cm and rotational inertia0.400 kg m2 rotates with an angular...
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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 3.26 m and a rotational inertia of 459 kg·m2 about the axis of rotation. A 73.6 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 2.86 rad/s when the student starts at the rim, what is the angular speed when she is 0.554 m from the center?
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