The force of inertia

When studying the question of what power isinertia (SI), often misunderstandings lead 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 a guess, and knowledge accumulated by science of luggage in this area did not yet exist.

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

Let us, on the basis of modern knowledge"Extend" this assumption. Galileo Galilei also pointed out that the force of inertia is directly related to gravity (attraction). And natural attracting objects, the impact of which 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 point.

Now it is known that the whole Universe is permeated withgravitational lines of different 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.

It is more correct to proceed from another definition -this force is a vector quantity 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 acceleration obtained; m is the mass of the moving body (or mathematical material point).

The most important point: it will be a mistake to consider that the 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 forsimilar effects: Coriolis and the portable force of inertia (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 a 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: centrifugal force of inertia, translational SI and rotational. If the first usually does not arise complications, 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).

PSI is necessary when studying the issuerelative motion, since it is necessary to take into account not only other known forces, but also it (F kor or F per) to create the body motion formulas in a non-inertial system.