_The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in$?

_The critical speed of a shaft with a disc supported in between is equ

1.	_The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in$?
A.	Transverse vibrations
B.	Torsional vibrations
C.	Longitudinal vibrations
D.	All of these
Answer» B. Torsional vibrations

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_The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in$?

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