Physics
The moment of inertia of a body does not depend upon its

Form of mass
Axis of rotation
Angular velocity
Distribution of mass

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Physics
Railway tracks are banked on curves

necessary centripetal force may be obtained from the horizontal component of the weight of the train
necessary centrifugal force may be obtained from the horizontal component weight of the train
to avoid frictional force between the tracks and wheels
the train may not fly off in the opposite direction

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