What is axis?

What Does axis Mean

The term axis , which comes from Latin (axis or ax) has multiple uses, definitions and applications. In its origins it represented the bar that connected the wheels of the carts and, later, the imaginary line that crosses the planet Earth from pole to pole.

In the field of mechanics , for example, an axle is considered as a constructive part that is useful when directing the rotational movement of an element or a group of parts, as can occur when working on a wheel or a gear.

The axles of a vehicle , on the other hand, represent imaginary lines of transverse direction in front of which the wheels turn when the car goes straight ahead. In vehicles that have wheels on both sides, the axis is the transverse line that allows the centers of two of them to be joined.

In mathematics , likewise, the axes allow us to locate a geometric figure in space, and then transform it according to our needs. By convention, the horizontal axis is referenced with the letter X, the vertical with the letter Y, and the one that represents depth, with Z. Without the existence of this concept that serves as the basis for countless calculations, rotation being the More popularly associated with it, not only would mathematics be a much less complex and comprehensive science, but the impact would reach the realm of entertainment, since there would be no video games, animated films, and most special effects.

Among the known types of axes, we find those of symmetry. These imaginary lines represent lines that cut a figure in such a way that the vertices that are located on each side have an equivalent to the other. Simply put, an axis of symmetry cuts an object into two identical parts. Again, we often see video effects that are based on this principle, and that produce kaleidoscopic images.
The concept of rotation is very complex and there are several ways to obtain the same result. Basically, an axis used to perform this calculation serves as a reference to change the orientation of a figure or object without altering its shape. In everyday life, we are used to the fact that matter does not deform and we do not need technical knowledge to, for example, turn an apple that we hold in one hand. But if we had to represent that simple action and the consequent transformation of the fruit into numbers, everything would be more complex. First, we would need to convert the apple to a series of points or verticesand locate them in a system of axes. Its position could not be random, since the result obtained would depend on it and we would have to take this collection for each of the 3 axes. To give a simple example, if we wanted the apple to rotate to the right and not shift when doing so, we should position it so that the vertical axis cuts it at its exact center.

This word is also relevant in the field of anatomy, where it refers to the second vertebra of the neck, which acts as the axis in the rotational movement of the human head. Other related uses, divide the body into several hemispheres: one cuts it vertically from head to toe (the cranio-caudal axis), another horizontally (the lateral-lateral) and one that crosses the body from back to front (the axis ventro-dorsal).

It should be noted that, in the field of politics , the concept of Axis (which is usually written with a capital letter) refers to certain alliances between two or more States . There, the principles and norms that govern community life are established, according to the social status of a certain nation. It establishes the necessary organization for a correct and balanced exercise of power. In World War II , for example, the Axis between Italy , Germany, and Japan was formed to fight the Allies and it grew out of an understanding between Hitler and Mussolini. On the other hand, George W. Bush referred to the Axis of Evilin relation to an alleged alliance between North Korea , Iraq and Iran .
Other related meanings are the cultural and social axis. The first refers to a projection that ensures a certain nation grow in such a way that its past, its customs, everything that has given it identity is not lost. In the second case, it will seek to preserve what is considered key in a society and which in general is the family , aiming at the best possible quality of life for its inhabitants.

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