Multiple choice

Frictional force always opposes the motion of one object over another object. On which of the following factors does the friction between two surfaces depend?

a. The amount of surface area of the two objects that is in contact with each other b. Smoothness or roughness of the two surfaces c. The force with which the two surfaces are pressed together

  1. Only a

  2. Only b

  3. Only a and b

  4. Only b and c

  5. Only a and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. The friction between two surfaces depends on the smoothness or roughness of the two surfaces and the force with which the two surfaces are pressed together.

Keep practicing — related questions