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Rotational Inertia

A closed cyli...

Question

A closed cylindrical tube containing some water ( not filling the entire tube) lies in a horizontal plane, if the tube is rotated about a perpendicular bisector,the moment of inertia of water about the axis:

A

increases

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B

decreases

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C

remains constant

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D

increases if the rotation is clockwise and decreases if it is anticlockwise

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Solution

The correct option is B increases
When the table is rotated about its perpendicular bisector, Vertex inside it experiences centrifugal force and thus shift towards the end of the tube . thus the mass goes away from the axis and the moment of inertia increases.

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Q. A closed cylindrical tube containing some water (not filling the entire tube) lies in a horizontal plane. If the tube is rotated about a perpendicular bisector, the moment of inertia of water about the axis
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