what is friction force
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Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.
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When a object and the surface of the ground rub against each other. This gives rise to a force that acts in the opposite direction of the motion of the object. Such a force is called friction. Friction is a force that results when two surfaces rub against each other.
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