Why does some friction occur with seemingly smooth surfaces?
Look at it under a microscope. There is nothing that is "smooth"
your my anyoying
A smooth surface is not actually smooth; it may have many microscopic bumps on its surface.
Because on the molecular level, they are not smooth.
or just search it up on google. it has a bunch of good answers
Friction occurs between seemingly smooth surfaces due to microscopic irregularities or roughness on the surface. Even though an object may appear to have a smooth surface, when viewed under a microscope, it will reveal tiny bumps, pits, and imperfections. When two surfaces come into contact, these microscopic irregularities interlock, causing resistance to the motion of objects sliding past each other. This resistance is what we refer to as friction.
To understand why friction occurs on seemingly smooth surfaces, you can perform the following experiment:
1. Take two objects with seemingly smooth surfaces, like two glass or metal plates.
2. Examine the surfaces under a microscope and observe the presence of tiny irregularities.
3. Place one plate on a flat horizontal surface and try to slide the second plate on top of it.
4. The resistance you encounter while sliding the plates against each other is due to friction.
These microscopic irregularities cause the surfaces to grip or stick to each other, resulting in friction. The amount of friction depends on factors such as the materials of the surfaces, the force pressing them together, and the roughness of the irregularities.