What Is Normal Force?

Literally, the normal direction is the direction of the normal, which is perpendicular to the tangential direction, the direction of the tangent. Both the tangential and normal directions are relative to the interface, trajectory, etc.

Normal direction

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Literally, the normal direction is the direction of the normal, which is perpendicular to the tangential direction, the direction of the tangent. Both the tangential and normal directions are relative to the interface, trajectory, etc.

Chinese name

Normal direction

Definition

Normal direction

break down

Tangential component

Features

Particles moving along a curve

In general, the acceleration of a particle moving along a curve can be decomposed into two orthogonal components, namely:

The tangent component is called the tangential component.

The component that is perpendicular to the orbit is called the normal component.

As shown in the figure, the force N is perpendicular to the plane P, so the force N is said to be normal.