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Whydoesfriction occur when two surfaces are in contact? |
Answer» <p>Friction occursbecause nosurfaceis perfectly smooth. Roughersurfaceshave morefriction between them. Heavier objects also have morefrictionbecause they press together with greater force.Frictionproduces heat because it causes the molecules on rubbingsurfacesto move faster and have more energy.</p> | |