Question

why does friction produce heat?

Answer 1

Friction produces heat for much the same reason it produces dust. When you push objects in contact, you are putting energy into it. And that energy gets broken down by a number of mechanisms that essentially involving molecules bumping into other molecules. The derainls will vary with the materials involved. But each of these micro-collisions takes a tiny amount of the energy you put in. Which breaks up your initial lump of energy onto tiny splinters of energy. Which is heat. Not makes heat, is heat: lots of tiny packets of energy distributed across all the molecules.

Answer 2

Friction produces heat because they contains electromagnetic charge.

When two surface's are roughed(in opposite direction) produces heat.

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