Question #114144

A fly wheel has a moment of inertia of 3.8kgm^2.what constant is required to increase its frequency from 2rev/sec to 5rev/sec in 6 revolutions?

Expert's answer

6 revolutions correspond to angular displacement of "\\phi=6\\cdot2\\pi=12\\pi".

To increase the angular velocity, there must be angular acceleration:

The torque required to provide such acceleration is

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