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Laws of movement of Newton

If the kinematics studies movement of a geometrical body which does not possess any properties of a material body, except for property to take the certain place in space and to change this position eventually dynamics studies movement of real bodies under action of the forces enclosed to them. Three laws of mechanics established by Newton underlie dynamics and make the basic section of classical mechanics....

Directly they can be applied to the elementary case of movement when the moving body is considered as a material point i.e. when the size and the form of a body it is not considered and when movement of a body is considered as movement of the point possessing in weight. In boiled water for the description of movement of a point it is possible to choose any system of coordinates concerning which sizes describing these movement are defined. For a body of readout any body can be accepted, moving concerning others ph. In dynamics deal with the inertial systems of coordinates characterized by that concerning them the free material point moves with constant speed.