# Formula Coriolis force - magnitude (velocity and angular velocity orthogonal) Winkelgeschwindigkeit    Velocity    Mass ## Coriolis force

Unit
Coriolis force is a fictitious force acting on a moving body only in rotating reference systems (like e.g. on the earth). Coriolis force always acts orthogonal to the angular velocity $$\omega$$ (e.g. angular velocity of the earth) and the linear velocity $$v$$ of the body under consideration (e.g. a ball on the rotation disc).

Note that for this formula the direction of the angular velocity must be exactly orthogonal (i.e. at a 90 degree angle) to the velocity.

## Winkelgeschwindigkeit

Unit
Angular velocity indicates the number of rotations per second. For example, the angular velocity of the Earth in units of $$2 \pi$$:$\omega ~=~ \frac{2\pi}{24 \, \text{h}} ~=~ 7.27 \cdot 10^{-5} \, \frac{1}{\text s}$

## Velocity

Unit
Velocity of a body of mass $$m$$ moving with velocity $$v$$ perpendicular to angular velocity $$\omega$$. For example, a ball pushed from the edge of the circling disc to the center of the disc.

## Mass

Unit
Mass of a body moving with velocity $$v$$. For example, a ball on a rotating disk.