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It is shown that formulas for the radiative power loss and radiation reactionfrom a charge can be derived in a heuristic manner from the kinetic power (rateof change of the kinetic energy) of its electric inertial mass. The derivationassumes a non-relativistic but otherwise an arbitrary motion of the charge. Weexploit the fact that as the charge velocity changes because of a constantacceleration, there are accompanying modifications in its electromagneticfields which can remain concurrent with the charge motion because the velocityas well as acceleration information enters into the field expression. However,if the acceleration of the charge is varying, information about that being notpresent in the field expressions, the electromagnetic fields get `out of step'with the actual charge motion. Accordingly we arrive at a radiation reactionformula for an arbitrarily moving charge, obtained hitherto in literature fromthe self-force, derived in a rather cumbersome way from the detailed mutualinteraction between various constituents of a small charged sphere. This way wedemonstrate that a power loss from a charge occurs only when there is a changein its acceleration and the derived instantaneous power loss is directlyproportional to the scalar product of the velocity and the rate of change ofthe acceleration of the charge.

A heuristic derivation of radiative power loss and radiation reaction from the kinetic power of electric inertial mass of a charge