  The change in the kinetic moment of a material body is considered regarding
to classical and quantum mechanics. The possibility of creating the propulsion
system in terms of energy efficiency exceeding the photon engine has been
theoretically proved. The proposed new principle of motion is based on the law
of conservation of angular momentum and is fully consistent with the basic
fundamental laws of physics. It is proposed to use the radiation/absorption of
streams of low-energy particles with spin in the direction perpendicular to the
movement of the material body. The practical implementation of this idea is
confirmed by the presence of promising approaches to solving the problem of
quantizing gravity (string theory, loop quantum gravity, etc.) recognized by
the world scientific community and by the successful results of experiments
conducted by the authors with the motion of bodies in a vacuum chamber. The
proposed idea, the examples and experiments has given grounds for the formation
of new physical concepts of the speed, mass and inertia of bodies. The obtained
results can be used in experiments to search for elementary particles with low
energy, to explain a number of physics phenomena and to develop transport of
objects based on new physical principles.
