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Centripetal motion and centrifugal motion
That's not necessarily true.

Proximal motion means that the actual normal acceleration is greater than the centripetal acceleration required for circular motion.

Centrifugal motion means that the actual normal acceleration is less than the centripetal acceleration required for circular motion.

The change of speed depends on acceleration, and acceleration depends on force, so the change of speed and acceleration can't be determined when the force is uncertain.

Let's analyze the specific situation.