A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible alternative to batteries in electric cars. The gasoline burned in a 243-mile trip in a typical midsize car produces about 4.81 x 10° J of energy. How fast would a 46.7-kg flywheel with a radius of 0.475 m have to rotate to store this much energy? Give your answer in rev/min.

A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible alternative to batteries in electric cars. The gasoline burned in a 243-mile trip in a typical midsize car produces about 4.81 x 10° J of energy. How fast would a 46.7-kg flywheel with a radius of 0.475 m have to rotate to store this much energy? Give your answer in rev/min.

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 30PQ

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