What is a force that resists motion between two surfaces that are in contact?

FrictionWhen two surfaces touch each other, there is some adhesion between the two. That adhesion results in friction, which opposes the motion of one surface with respect to the other.

Friction opposes motion between two surfaces.

*you will have more friction if you have rougher surfaces. the smoother the surfaces, the less friction.*

*friction is caused by the microscopic hills and valleys on objects rubbing up*