Radial Motion

The prototypical motion of modern Physics is that of an object under the influence of Gravity.  Since that motion is conceived as rectilinear, modern Physics inverts Aristotelianism, by positing rectilinear motion as fundamental, and circular, i. e. curvilinear, motion as derivative.  However, what Repulsion and Attraction, e. g. expansion and contraction, cause primarily are not linear changes, but variations in volume.  Thus, those effects might be classified neither as rectilinear nor as curvilinear, but as 'radial motion'.  Now, since Gravity is a universal attractive force, the linearity of an object falling towards the Earth is an abstraction from the general radial influence of the latter.  Likewise, insofar as linear mechanical motion is caused by a repulsive force, e. g. impact, it, too, is a species of radial motion.  Thus, the presupposed fundamental motion of modern Physics is radial, not linear, i. e. neither recti-, nor curvi-.