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Stopping distance of a car rolling down a hill
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[QUOTE="haruspex, post: 6015838, member: 334404"] To clarify, as mfb indicated, it is a matter of rolling resistance, not friction. The wheels rotate, so the friction between the wheels and ground is static friction. Static friction does not do work because the points in contact do not move relative to each other. Rolling resistance is a bit more complicated. In general, it is made up of three different things: - imperfectly elastic deformation of the wheels - imperfectlly elastic deformation of the ground - axial friction Axial friction is proportional to load, just like regular planar kinetic friction, so leads to the same result. Losses from deformation can rise faster than linearly, though, so a greater mass could lead to less distance. [/QUOTE]
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Stopping distance of a car rolling down a hill
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