why over-polishing increases fric
tional force ?Explain
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friction arises due to molecular adhesion,more presicely due to electrostatic forces.The roughness of the surface plays a role when the bumps(hills and valleys) to lock the surfaces each other and avoid motion.but if the surfaces are further,the bumps become even and the area of contact increase,the surface molecules ...
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if friction is zero we cant even lift because when friction is zero that means our contact with other surface is 0 that means high attraction between electrons of both surfaces so we cant move.... if more polishing then friction is 0 that means we cant move :-)
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