Why Does Friction Occur
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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.
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the friction organ between moving surface is there is no friction then the substance will be doesn't move at all fresh and produced by the heating and the temperature and also the situation which it has that time does friction does occur
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