Why does Friction occur?
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Answer: 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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Answer:
Friction is a force that opposes motion. It occurs when two surfaces are in contact with each other. Friction occurs due to the roughness of the surfaces in contact.This is the reason why a book stops after sliding for some distance on a perfectly smooth looking glass on top of a table.
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