  A system of $N$ interacting objects with internal degrees of freedom is
considered. Derivation of system of equations for the description of two
interacting objects with spin is given. Relations between the parameters
describing subsystems and the parameters describing the system as a whole are
obtained. In particular, relation between energies of subsystems and energy of
system is found, on the basis of which the assumption is made that energy of
subsystem should be oscillatory functions of time, so that interaction between
objects is reduced to permanent energy exchange
