Question

fill in the blank question
as two surfaces slide over each other, the bumps on these surfaces rub and stick together to cause
need help? review these concept resources.
read about the concept

Explanation:

Friction is the force that opposes the relative motion between two surfaces in contact. When two surfaces slide over each other, the irregularities (bumps) on their surfaces interlock, rub, and stick. This interaction resists the motion, which is defined as friction.

Answer:

friction