The words speed and speed are often used synonymously, but it turns out that speed is actually the absolute value of speed, which is why they are terms that commonly tend to be confused. Its true synonym is speed, and it turns out to be the relationship between the distance traveled by a body and the time it takes to do so. The speed is a magnitude scaling origin, ie it is only a numerical measure because only employs a number.
Despite the fact that speed and velocity have the same dimension, they are not equal because, as we mentioned earlier, speed has a scalar character and velocity is a vector magnitude, which relates to the change in position of an object or body over time, In other words, apart from having a module, which defines the size of the speed, it also has a direction, which is responsible for indicating where that speed is pointing, there lies the difference between the two. For example “ this car has a speed of 120 kilometers per hour ”, “both riders were very fast, but in the final the fastest was the one who won the competition”.
Consequently it can be said with exactitude that the speed or celerity is a scalar quantity that only indicates the magnitude of the speed. In addition, in everyday language this word is often used to indicate the quality of someone fast, taking it as a characteristic of a person, an animal or an object.
