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Introductory Physics Homework Help
Direction of friction in circular motion
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[QUOTE="haruspex, post: 6043304, member: 334404"] Just to stress that a bit more, slipping is [B][I]relative[/I][/B] motion of surfaces in contact; friction opposes that relative motion, not motion in the lab frame. Also, part of your confusion comes from motion in the sense of acceleration versus in the sense of velocity. Without friction, there is no acceleration (in the lab frame) and the velocity is tangential. With static friction, the acceleration is radial and the velocity keeps changing. [/QUOTE]
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Direction of friction in circular motion
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