In 1835, French scientist Gaspard-Gustave de Coriolis wrote a paper in which he mathematically derived equations of motion for rotating coordinate systems [1]. In this paper he drew attention to two categories of supplementary forces. Coriolis referred to these forces in the plural. The forces in the first category were the ordinary centrifugal forces, while the forces in the second category were described as being equal to twice the product of the angular velocity of the mobile plane, taken with respect to the relative momentum as projected unto that plane. By analogy with the mathematical formula for the ordinary centrifugal forces, Coriolis called this second category of supplementary forces ?The compound centrifugal forces?. This paper aims to establish the fundamental physical cause behind centrifugal force as well as its connection with the medium for the propagation of light.

Keywords: centrifugal force, Coriolis force

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