What does the word "normal" mean in the phrase "normal force"?
A) the force that is usually exerted by a surface
B) the total force exerted by a surface
C) the component of the force exerted by a surface parallel to the surface
D) the component of the force exerted by a surface perpendicular to the surface
E) the force is due to contact between two objects.

Question

Quizplus · Accepted Answer

In physics, the normal force is the component of the force exerted by a surface perpendicular to the surface. It is called "normal" because it is at a right angle (or "normal" angle) to the surface.

What Does the Word "Normal" Mean in the Phrase "Normal