El movimiento / the motion / le                        mouvement

 

 

The most simplest motion in nature. A body in uniform motion covers equals distance in equals intervals of time in a straight line. It means that its velocity is constant. There are some examples about this in nature, like the movement of an airplane, the movemen of a train.

Therefore, its speed and direction are both constant. The body always will be moving in a line.

 

 

 

 

 

 

 

Therefore the module of the average velocity is equals to average speed.