The force of inertia

When studying the question of what is the force of inertia (SI), often there are misunderstandings leading to pseudoscientific discoveries and paradoxes. Let's look at this issue, applying a scientific approach and justifying everything that was said by the confirming formulas.

The force of inertia surrounds us everywhere. Its manifestations people noticed in ancient times, but could not explain. Seriously, she was studied by Galileo, and then by the famous Isaac Newton. It is because of its lengthy interpretation that erroneous hypotheses have become possible. This is quite natural, because the scientist made an assumption, and knowledge accumulated by science of luggage in this area did not yet exist.

Newton argued that the natural property of all material objects is the possibility of being in a state of uniform motion along a straight line or rest, provided that there is no external influence.

Let's expand this assumption on the basis of modern knowledge. Galileo Galilei also pointed out that the force of inertia is directly related to gravity (attraction). And natural attracting objects, whose impact is obvious - they are planets and stars (due to their mass). And since they have the shape of a ball, Galileo pointed out this. However, Newton completely ignored this moment.

Now it is known that the entire Universe is permeated with gravitational lines of varying intensity. Indirectly confirmed, although mathematically not proven, the existence of gravitational radiation. Consequently, the force of inertia always arises with the participation of gravity. Newton, in his assumption of the "natural property" of this also did not take into account.

More correctly proceed from another definition - this force is a vector value whose value is the product of the mass (m) of the moving body by its acceleration (a). The vector is directed counter-acceleration, that is:

F = m * (-a),

Where F, a are the values of the force vectors and the resulting acceleration; M is the mass of the moving body (or mathematical material point).

The most important point: it will be a mistake to consider that acceleration itself is caused by force, as it may seem from the formula. That's why "-a" is written, but not "a" - as a clue.

Physics and mechanics offer two names for this effect: the Coriolis and the portable inertia force (PSI). Both terms are equivalent. The difference is that the first option is universally recognized and is used in the course of mechanics. In other words, the following equality holds:

F kor = F per = m * (- a kor) = m * (- a per),

Where F is the Coriolis force; F per is the portable force of inertia; A kor and a per are the corresponding acceleration vectors.

The PSI includes three components: the centrifugal force of inertia, the translational SI and the rotational force . If from the first usually no difficulties arise, then the other two require an explanation. The translational force of inertia is determined by the acceleration of the entire system as a whole with respect to some inertial system with a translational variety of motion. Accordingly, the third component arises from the acceleration that appears when the body rotates. At the same time, these three forces can exist independently, without being part of the PSI. All of them are represented by the same basic formula F = m * a, and the differences are only in the type of acceleration, which, in turn, depends on the type of motion. Thus, they are a particular case of the Coriolis force of inertia. Each of them participates in the calculation of the theoretical absolute acceleration of a material body (point) in a fixed frame of reference (invisible for observation from a non-inertial system).

PSY is necessary in the study of the relative motion problem, since not only other known forces need to be taken into account to create the body motion formulas in a non-inertial system, but also it (F kor or F per).