Following Einstein we know, that when the speed of mattery is about the “c” vallue, the further increase of speed causes “great” increase of mass. In our system the substance (mattery) is moving round around the circle with the vellocities close to “c” and acceleration “a”. Additionally this “wheel” makes a specific movement - forwards and backwards along the axis of rotation of the “wheel” that is in the center of the wheel. But this forwards and backwards movement is very specific. In one direction it moves faster in the other slower. In the direction (forwards-backwards), when the velocity is higher, the acceleration of the substance in wheel has some shorter time to operate and causes LOWER INCREMENT OF the valocity and MASS. In the direction (forwards-backwards), when the velocity is lower, the acceleration of the substance in wheel has some longer time to operate and causes BIGGER INCREMENT OF the valocity and MASS. Different masses at the ends of the forwarwads-backwards movement cause different FORCES. On one of the ends the force is always smaller than on the other side. The system moves in one side of a forwards-backwards movement depending on whether it is acceleration, slowing down, and depending on which side is the forwards and which side is the backwards.