College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A car is designed to get its energy from a rotating flywheel in the shape of a uniform, solid disk of radius 0.650 m and mass 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 5.30 ✕ 103 rev/min.

(a) Find the kinetic energy stored in the flywheel (in J).
 
(b) If the flywheel is to supply energy to the car as a 12.0 hp motor would, find the length of time in hours the car could run before the flywheel would have to be brought back up to speed.
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