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 1.10 m and a rotational inertia of 429 kg-m² about the axis of rotation. A 54.4 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.33 rad/s when the student starts at the rim, what is the angular speed when she is 0.404 m from the center?
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 1.10 m and a rotational inertia of 429 kg-m² about the axis of rotation. A 54.4 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.33 rad/s when the student starts at the rim, what is the angular speed when she is 0.404 m from the center?
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Transcribed Image Text: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 1.10 m and a rotational inertia of 429 kg-m? about the axis of rotation. A 54.4 kg student walks slowly
from the rim of the platform toward the center. If the angular speed of the system is 1.33 rad/s when the student starts at the rim, what
is the angular speed when she is 0.404 m from the center?
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rad/s
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