what is friction? how did it cause ?how to reduce friction?how to increase friction?
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Friction is the resistance motion of one object moving relative to other.It cause due to rough surface. To reduce friction the surface will be totally smooth that any body could slide over that surface. To increase friction we have to make rough that surface over which the body slides
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Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.
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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