The real force needed is not a propelling but a deflecting force.
If allowed to "precess" it will respond by moving perpendicularly to a deflecting force.
A familiar example of this deflecting force is afforded by the force of gravity, as it acts on a projectile.
1969 (earlier Coriolis force, 1923, and other references back to 1912), from the name of French scientist Gaspard Gustave de Coriolis (1792-1843) who described it c.1835.
|Coriolis effect |
The observed effect of the Coriolis force, especially the deflection of objects or substances (such as air) moving along the surface of the Earth, rightward in the Northern Hemisphere and leftward in the Southern Hemisphere. The Coriolis effect is named after the French engineer Gustave Gaspard Coriolis (1792-1843).