An Explanation of Inertia outside Relativity
An electric charge Q of mass m, in the form of a spherical shell of radius a, moving at time t with velocity v and acceleration dv/dt, generates an electro-dynamic field X proportional to the acceleration. The field X acts on the self-same charge Q to produce an inertial force QX = -m(dv/dt), in accordance with Newton’s 2nd and 3rd laws of motion, where m is a constant. This explains the origin of inertia as electrical and internal to a body, contrary to general relativity. An expression deduced for the mass m, in terms of Q and radius a, is compared with the electrostatic energy E of the charge to obtain E = ½ mc2, in contrast to the mass-energy formula of special relativity, E = mc2, where c the speed of light in a vacuum.