Question

Fill in the blanks.
1.
any relative motion between the two surfaces that
Friction always
are in contact with each other.​

Answer 1

Explanation:

Friction always

any relative motion between the two surfaces that

are in contact with each other.

Answer 2

Answer:

Friction force always acts tangent to the surface at points of contact. Friction force acts opposite to the direction of motion. There are 2 types of friction: Static friction: If the two surfaces in contact do not move relative to each other, one has static friction.