A slender shaft supported on two bearings at its ends carries a disc w – McqOptions

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1.	A slender shaft supported on two bearings at its ends carries a disc with an eccentricity from the axis of rotation. The critical speed of the shaft is . If the disc is replaced by a second one of same mass but mounted with an eccentricily 2 , then the critical speed of the shaft in the second case is
A.	/
B.	/2
C.	2
Answer» B. /2

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