The word trajectory derives from the French "trajectoire" means "line described in space by a moving body, and, more commonly, the one followed by a projectile. " The word trajectory has different types of uses depending on the context that is going to be treated, as in kinematics the trajectory is a space of the geometry of the following positions through which a body passes in its displacement that will depend on each reference in which displacement is explained.
The classical mechanical trajectory resembles the following geometric sites of a body that is inhabited while moving and its specification depends on the site where the observation is performed.
The trajectory of a particle in space is established by the vector from the position "R" that is drawn at the origin "O" of a referential xyz to the position of the particle "P". When the molecule moves, the limit of the "R" line describes a curve "C" in space, which is called the trajectory.
The curvilinear trajectory can be two-dimensional because it has two dimensions that is the "wide and long", this is a plane and physical launch piece of the universe that uses it more than everything in the three-dimensionality that has three dimensions that are the "width, the length and depth ”.
The erratic trajectory is when the displacement is essential, but also its geometric shape is very irregular that is outside the rule or norm, contrary to them.
