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What are types of friction?

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Quick Answer

There are four general types of friction: static, kinetic, rolling and fluid. Friction is defined as the force that resists the motion of two objects sliding against each other.

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Static friction occurs when an object is forcefully moved along a surface and no movement takes place. The direction of the force is in the direction opposite of the motion. Kinetic friction takes place when an object just starts to move across another surface. Rolling friction is defined as the force that slows down the movement of a rolling object. Fluid friction is the restrictive force that slows down the movement of an object in liquid.

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