Question

A technology developed in the 1950's which is increasingly being applied in the 21st century, called flywheel energy storage, allows a bus to run on energy drawn from a massive, rapidly rotating flywheel. When the bus accelerates, energy is transmitted from the flywheel to the wheels of the bus.

A prototype of a pure flywheel storage bus uses a high density cylinder of radius 0.150 m and mass = 900.0 kg, which is spun up to 140. revolutions per second by an electric motor at the bus stop. If no energy is lost to thermal energy, what is the theoretical maximum distance that such a bus could travel if overcoming road and air friction require a force of 1050 N at the cruising speed of the bus?

Answer 1

Angular velocity,

Moment of inertia of cylinder,

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Energy stored in the flywheel = Rotational kinetic energy of the flywheel.

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The stored kintic energy is converted to workdone for moving

ANSWER:

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