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Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli
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Flywheels are large, massive wheels used to store energy.

Chapter 18, Problem 60GP

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QUESTION:

Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel’s energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. A motor spins up the flywheel with a constant torque of 50 N . m. How long does it take the flywheel to reach top angular speed of 1200 rpm?

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QUESTION:

Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel’s energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. A motor spins up the flywheel with a constant torque of 50 N . m. How long does it take the flywheel to reach top angular speed of 1200 rpm?

ANSWER:

SOLUTION: To solve this problem we require a some knowledge of moment of inertia and rotational kinematics and translational kinematics.The flywheel is a rigid body about central axis as shown in below figure.the initial angular speed taken as w = 0 and iinal angular speed is w = 1200 rpm.we must conv

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