Dynamics
Dynamics - a section of mechanics, in which the causes of the occurrence of mechanical motion are studied. Dynamics operates with such concepts as mass, force, momentum, moment of momentum, energy. Also, the dynamics are often called, in relation to other areas of physics, that part of the theory, which is more or less directly analogous to the dynamics in mechanics, contrasted, as a rule, with kinematics. Sometimes the word dynamics is used in physics and not in the above-described sense, but in a more general literary one: to refer to processes that are developing in time, depending on the time of some quantities, not necessarily bearing in mind the specific mechanism or the reason for this dependence.