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Resistance to motion

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Air resistance

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Fluid friction

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· Rolling friction is the resistive force that slows down the motion of a rolling ball or wheel. It is also called rolling resistance

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Running

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Sliding down a slide

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Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases. All four types of friction are described below.

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Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases. All four types of friction are described below.

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Rubbing on something

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Sliding friction

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Upwards and downwards

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static friction, sliding friction, rolling friction, and fluid friction.