  It is shown that formulas for the radiative power loss and radiation reaction
from a charge can be derived in a heuristic manner from the kinetic power (rate
of change of the kinetic energy) of its electric inertial mass. The derivation
assumes a non-relativistic but otherwise an arbitrary motion of the charge. We
exploit the fact that as the charge velocity changes because of a constant
acceleration, there are accompanying modifications in its electromagnetic
fields which can remain concurrent with the charge motion because the velocity
as well as acceleration information enters into the field expression. However,
if the acceleration of the charge is varying, information about that being not
present in the field expressions, the electromagnetic fields get `out of step'
with the actual charge motion. Accordingly we arrive at a radiation reaction
formula for an arbitrarily moving charge, obtained hitherto in literature from
the self-force, derived in a rather cumbersome way from the detailed mutual
interaction between various constituents of a small charged sphere. This way we
demonstrate that a power loss from a charge occurs only when there is a change
in its acceleration and the derived instantaneous power loss is directly
proportional to the scalar product of the velocity and the rate of change of
the acceleration of the charge.
