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What is the difference between centripetal and centrifugal force?

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What is the difference between centripetal and centrifugal force?

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One is real, one is imaginary and does not exist. There is no such thing as “centrifugal” force. Centripetal force is the force present in circular motion. Centripetal force is always pointed inward, towards the center of rotation. A centripetal force causes a centripetal acceleration. Any acceleration causes a change in velocity. Since the centripetal force is always pointed inward, radially along the circular path, it is always pointed perpendicularly to the velocity vector (which is always tangent to the circle), which makes it possible to have a constantly changing velocity with a constant speed. There is no “other half” of centripetal force, there is no balancing force necessary….actually if there were a balancing / opposing force, that would prevent circular motion from happening. In order for there to circular motion there MUST be an acceleration…there is no question about that, the velocity is constant changing, therefore there is an acceleration. From Newton’s 2nd law, in

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