If the length inertia is decreased to nine times, then what will be the effect on free torsional vibrations of a single motor system?
(a) Increases 3 times
(b) Increases 9 times
(c) Decreases 9 times
(d) Decreases 3 times
I got this question during an online exam.
My doubt is from Free Torsional Vibrations of a Single Rotor System topic in portion Torsional Vibrations of Machine Dynamics