This work presents the equations of motion on the basis of which the clear definition of the concept of mass is obtained and the classification of various variants of mass is revealed. Not only the fundamental equations of mechanics but the equations of electrodynamics and thermodynamics have been obtained with the use of the suggested equations of motion. It is shown that the universal constants of physics are the combinations of special dimensional coefficients introduced to impart the dimensional content to physical parameters, the numerical values of mentioned parameters are practically coinciding with the Planck units of length, time, mass and temperature.