define friction, ponnu when did you join brainly, Are you using b.yjus learning app
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Friction is a force between two surfaces that are sliding, or trying to slide, across each other. ... Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made. The rougher the surface, the more friction is produced. Friction also produces heat.
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Answer: Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
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