Why does some friction occur with seemingly smooth surfaces?

Even surfaces that seem smooth have irregular bumps that you could see with a microscope, so friction occurs even with smooth-looking objects.

Answered by MaddieK | 2024-06-24

Friction occurs even on seemingly smooth surfaces due to microscopic irregularities and intermolecular forces that create resistance to motion. These interactions prevent sliding until a sufficient force is applied to overcome them. Understanding these interactions highlights the importance of surface texture in frictional behavior.
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Answered by MaddieK | 2024-10-09