  We consider a electron in a external field in D=5, through the Dirac equation
in the Galilean symmetry approach, and in the Lorentz symmetry approach; from
these we perform the nonrelativistic limit, then we procede the supersymmetry
of the same that is associated with the Galilean symmetry, we identify as a
supersymmetry sector from the quantum-mechanical dynamics, and we got the
algebra of fermionic charges. We naturally define as extra electrical vector E,
and interpret the terms of energy coming from the fifth dimension. The energy
from the fifth dimension, criate this extra electrical vector E, associated
with the fifth component of the external electrical field A, this makes the
energy flow from the fifth dimension to the usual three-dimensional space, when
some symmetries of the usual space are broken, giving a preferential direction
in the space, even though the standard electrical and magnetic fields are null.
