Figure 1. Schematic representation of the system accelerations produced by forces acting on the sample container during centrifugation, where g = acceleration of gravity, ca = centrifugal acceleration and ra = resulting acceleration. The detail in the upper right shows an isometric view from the top tray of the centrifuge, indicating the direction and sense of its Cartesian axes in order to facilitate the identification of acceleration application.

From

A New Electronically Monitored Centrifuge for the Analysis of Plant Growth in Simulated Hypergravity

M. J. A. Nava, T. Russomano, M. A. dos Santos, L. B. Poehls

American Journal of Medical and Biological Research. 2015, 3(4), 88-94 doi:10.12691/ajmbr-3-4-2