Question

Friction is actually caused by what?

A. The electrostatic interaction between the molecules on the two surfaces moving across each other which is seen as normal forces on a microscopic scale.
B. The ratio of the mass is between the object.
C. The amount of force used to move one object where a higher force creates higher friction.
D. The interaction between the chemical bonds of the materials the objects are made of.

Answer 1

The atomic number

The electrostatic interaction between the molecules on the two surfaces moving across each other which is seen as normal forces on a microscopic scale.