Question

Friction happens when two surfaces ______ each other.​

Answer 1

Answer:

Friction happens when two surfaces come in contact with each other.

Hope it helps.

Answer 2

Explanation:

Opposes

Frictional force acts between two surfaces in contact. It stops the object from moving as the irregularities on both the surface lock into each other, thus obstructing any forward motion. Hence, frictional force always opposes the applied force.