GATE ME 2020 Set 1 — Question 30
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Theory of Machines & Vibrations → Balancing, Flywheels & Gyroscopes → Flywheels & Governors
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Question
A flywheel is attached to an engine to keep its rotational speed between and . If the energy fluctuation in the flywheel between these two speeds is then the moment of inertia of the flywheel is ______ (round off to 2 decimal places).
Correct answer
0.98 to 1.02
Solution
The energy fluctuation in a flywheel is given by the difference in kinetic energy at maximum and minimum speeds:Given:
Substituting the values into the formula:
.
Substituting the values into the formula:
.
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