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.

Given, radius of solid disk r = 0.650 m mass m = 600 Kg ω= 5.30 x 103 rev/min

Answered: A car is designed to get its energy…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 20P

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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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