1Fundamental Principle of Dynamics
The movement equations that have been presented in the previous volumes of this series on non-deformable solid mechanics are the scalar expression of the fundamental principle of dynamics and the different consequences that stem from it. But in using this principle, the choice of the frame in which to apply it (depending on the motion being studied) is crucial. The step is therefore to see how this decision can be made so that mechanics users may have a proper frame for the studied motion that is suitable for its context.
1.1. The fundamental principle of dynamics and its scalar consequences
The fundamental principle of dynamics is one of the general laws that govern mechanics just as the secondary principles that will be presented in section 1.2 later on. Their formulation is the result of experimental observations and measures; their validity is essentially based on the fact that they are universally used.
1.1.1. Fundamental principle of dynamics
There exists at least one reference frame
g
, called Galilean, and a way to measure time (called the preferred time scale), such as, at any given time and whatever the considered physical set
, the dynamic ...