Archimedes' principleThe Archimedes’ principle is the name by which a postulate made by the Greek mathematician and physicist is known Archimedes of Syracuse (287 BC – 212 BC C.). This scientist pointed out that a body partially or totally submerged in a liquid at rest registers an upward vertical thrust that is identical to the weight of the volume of the liquid displaced by the body.

That push is a strength It is known as hydrostatic thrust or Archimedean thrust. Its measurement is carried out in newtons, a unit of the international system.

According to Archimedes’ principle, hydrostatic thrust is applied at the body’s center of gravity and depends on both the gravity as well as the density of the liquid and the volume of the body.

In short, Archimedes’ principle states that a body immersed in a fluid experiences a certain thrust (the hydrostatic thrust, in the vertical direction) that is equal to the weight that is dislodged from the fluid. This explains why certain objects float at Water and others do not, for example.

When an object sinks, its weight becomes greater than the weight of the displaced fluid. On the other hand, if the weight of the body is equal to or less than the weight of the dislodged liquid, the element in question floats. It all depends on the conditions of the thrust force, which if sufficient can make the object rise to the surface (float). It should be noted that the volume of the body is identical to the volume of the moving water.

The explanation is not extremely complex, particularly since we have all observed at least once the behaviour of a body when submerged in water. For those who have had the opportunity to swim in the sea or in the river, or even in a pool, this phenomenon can be seen very often; In the domestic sphere, we have examples of both our body in the bathtub and the different utensils that we wash in the kitchen, if we fill the sink with water and leave them submerged for a while before rinsing them.

Archimedes' principleBut going from practice, from the description of Archimedes’ principle that many of us can observe in such everyday examples as a day at the beach or cleaning the kitchen, to the scientific formulation entails an increase in complexity that demands more attention. The formula Archimedes’ principle is as follows: E = Pe V = pf g V; if you want to use for the comparison with the object’s process, use E = -Pe V = -pf g V.

Let’s see the reference of the variables: the first is AND, the push; then we have Pe, the specific gravity of the liquid; pf is the density; g represents the acceleration of gravity; VFinally, it is the volume of the fluid that is moving.

With regard to Archimedes, we must point out that science was always something everyday for him, since he grew up in an environment where other people had these same interests; his father, without going any further, was an astronomer. From a young age, Archimedes showed an excellent predisposition to learn, and in fact his passion for learning prompted him to travel to Alexandria to study his studies.

It was precisely there that he befriended Eratosthenes of Cyrene, and together they carried out the measurement of the circumference of the Earth. It is believed that from this teacher-student relationship his taste for astronomy arose or intensified. When he returned to his hometown, he began to dedicate himself to mathematics, geometry, mechanics, optics and physics, among other disciplines.