A neutral fermion is therefore constantly decelerated by the inherent resistance of the BF. Furthermore, there is a minimum velocity at which a neutral fermion can move through the BF. To achieve this minimum velocity from the "absolute rest," it is necessary to apply a minimum force in order to overcome the resistance of the BF. This force is again the inertial force. A particle can move through the space, only if it is accelerated to the above mentioned minimum velocity.

Supposing a punctual fermion is in a certain instant overcoming inertia from the absolute rest, it will achieve a minimum velocity, interacting each time, in a minimum time, with 1 VG at a length, equal to Planck's Elementary Length:

[5]           Fi = m vmin/tmin = 6 E(S)/l

Where Fi:  Inertia of a fermion

  m:  Mass of a fermion

  vmin:  Absolute minimum velocity that a fermion can reach in the BF

  tmin:  Minimum time, necessary to loose the 6 strings of one VG in the BF

  l:  Planck's Elementary Length

Each time a VG from the BF interacts and produces a RG, the BF changes (it contracts due to the expulsion of 1 RG out of the matrix of the BF). When a fermion crosses the space, the global contraction of the BF is proportional to the total amount of interactions with VG of the BF. As a result, in our universe, space is constantly contracting and a constant momentary reduction of the BF takes place. Since in the space, there is an almost unlimited number of VG, the BF is reorganized constantly by the surrounding VGs. To do this, the free ends of the string halves of those VG, adjacent to the VGs that were converted into RG and left the BF, do connect each other thus producing again an intact, although contracted, BF.