  We consider (1+4) generalization of classical electrodynamics including
gravitation field. With this approach it is assumed a presence of an extra
component of extended field stress tensor, whose physical interpretation is
based on necessity to obtain Newton gravity law as particular case. In model
analyzed in present work mass of having in 4D a rest mass particle moves in
five-dimensional space-time along fifth coordinate with light velocity and its
electric charge is a stationary value in additional dimension. Generalized
gravity law that is obtained from extended Maxwell equations confirmed by
existence of variable component of Pioneer 10 additional acceleration, whose
analyze is made in frame of this model.
