Physics
The motion of a body around a circular path is an example of

Uniform speed, uniform velocity
Uniform speed, variable acceleration
Uniform velocity, variable acceleration
Uniform speed, variable velocity

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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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