two ___ surfaces when we.placed together meet only a certain points
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Friction is a force that opposes motion between any surfaces that are touching.Other examples of friction are illustrated in the two Figures below . Did you ever rub your hands together to warm them up, Why does this make your hands . That's why we put sand on icy sidewalks and roads. . It not only warms your hands.
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Friction is the force which opposes motions of the two surfaces that are touching together a certain point.
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