This work - breaking away from the prevoius tradition - would like to approach the physical mechanical properties of granular materials from a new point of view. Most of the theorems, which were put for continuums, cannot be applied to the aggregation pf separate, solid granules. Only those matural laws can be considered as the starting point of examination, which are also valid for the universal material.
Contary to the continuum theory, by examining the equilibrum and kinetic state of individual granular particles this new thesis is based on simple experiments, on the Newtonian laws, and on an epmirical law, the law of friction. The correctness of this theory as also proved by experimental and measurement results.