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If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system?

If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? Correct Answer Decreases 2 times

Since the free torsional vibrations of a single motor system depend on the inverse of square root of the mass moment of inertia of the system, increasing 4 times will lead to decrease in two times the initial vibration.

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