What is Kinematics?

In order to know the meaning of the term kinematics, it is necessary to discover, in the first place, what is its etymological origin. In this case, we can determine that it derives from the Greek, exactly from the sum of two clearly delimited components:
-The noun “kineema”, which can be translated as “movement” or “agitation”.
-The suffix “-tikos”, which is used to indicate “relative to”.

The idea of kinematics refers to what is linked to movement: the change of position of a body. Kinematics is also called the specialty of physics that is focused on the analysis of motion, without taking into account the characteristics of the forces that generate it.

It can be said that kinematics studies the movement of bodies, leaving aside the causes that cause it. That is why it is in charge of analyzing the trajectories that bodies travel in time.

The acceleration and magnitude are the most important magnitudes with which it works kinematics. Acceleration is obtained by dividing a change in speed by the time that was used, while the speed is the result of dividing between the space traveled and the time used.

In addition to all the above, we cannot ignore the existence of a series of data of interest on kinematics:
-Its three fundamental elements are the object in motion, space and time. However, there are others that must also be known such as position, trajectory, distance and displacement without forgetting the corresponding speed and what is called average acceleration, which is the change in speed with respect to time.
-Coordinate systems are basic tools for work within this discipline at hand.
-In kinematics the concept of average speed is widely used. This comes to relate what is the total distance that the object has traveled with the time it has taken to travel it.
-When working on kinematics, one must start from something as important as the type of movement carried out by the object in question. Thus, we find the fact that it can be uniform rectilinear, uniformly accelerated rectilinear, circular, simple harmonic, uniform circular, parabolic, uniformly accelerated circular, complex harmonic, rigid solid…

At a mathematical level, kinematics indicates how the position coordinates of a body change as a function of time. Said trajectory can be described by means of a mathematical function that depends on the acceleration (the change of the velocity in time) and the velocity (the time in which the body changes its position).

We can analyze the kinematics from the case of a train heading of a point A to a point B. If both points are separated by a distance of 400 kilometers and the train takes 2 hours to complete the journey, its average speed was 200 kilometers per hour. With a constant acceleration in the same direction as the velocity, a rectilinear motion occurs with uniform acceleration and a velocity that varies in time. On the other hand, when the speed is zero, the rectilinear motion is uniform and the speed constant.