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Whatisfriction

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Whatisfriction
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Meghna Thapar 5 years, 6 months ago

Friction is a force that holds back the movement of a sliding object. Friction is defined as the force that opposes the motion of a solid object over another. There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction. Friction is the force that resists motion when the surface of one object comes into contact with the surface of another. In a machine, friction reduces the mechanical advantage, or the ratio of output to input: an automobile, for instance, uses one-quarter of its energy on reducing friction.

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