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any force responsible for maintaining an object on a curved path around a fixed center. In introductory coursework this is usually "uniform circular motion" and yields several simple and useful relations. Not to be confused with the centrifugal pseudo-force experienced in an accelerated referenced frame.

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Centrifugal Force: Why is it so real even from non-inertial frame?

In the absence of any force (external observer) the object will simply remain on its (straight, constant velocity) trajectory. To the co-rotating observer this looks as if the object is "moving away" …
Sven Geier's user avatar