+Friction is a resistance that arises when two surfaces slide or try to slide against each other. This fundamental force opposes [Motion](/wiki/motion), transforming kinetic energy into [Heat](/wiki/heat) and requiring [Work](/wiki/work) to overcome. It is both essential for grip and a source of energy loss.
+## See also
+- [Force](/wiki/force)
+- [Lubrication](/wiki/lubrication)
+- [Drag](/wiki/drag)
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