In nature, everything is interconnected and continuously interact with each other.Each part of each of its components and is constantly exposed to a whole range of forces.
Although the amount of force that is large enough in nature, all of them can be divided into four types:
1. gravitational forces nature.
2. The forces of electromagnetic nature.
3. Force the strong type.
4. Strength of the weak type.
gravitational forces become conspicuous only in the scale of the cosmos.Strength of electromagnetic nature - the forces that occur in the interaction of particles having certain electrical charges.
resilient force - is one of the most important forces in nature.When a body is subjected to a process of deformation, the inside there is a particular strength, which is equal to the force of deformation, but with the opposite sign.The resilient force directed against the deformation of the body.Its varieties are pulling force, reaction force.
In physics there is such a thing as the elastic deformation.Elastic deformation - this is the phenomenon of deformation in which it disappears after external forces cease to act.After such a deformation of the body takes its original shape.Thus, the elastic force, the definition of which says that it arises in the body after elastic deformation, is a potential strength.The potential strength or conservative force - is a force that has its work can not be dependent on its trajectory, but only on the initial and final point of force application.Work conservative or potential strength of a closed path is zero.
can say that the elastic force of an electromagnetic nature.This force can be considered as a macroscopic manifestation of the interaction between the molecules of a substance or body.In any case in which there is a compressive or tensile body manifests an elastic force.It is directed against the forces generating distortion in a direction opposite to the displacement of the particles of the body and is perpendicular to the body surface undergoing deformation.Also, this force vector is directed in the direction opposite body deformation (displacement of its molecules).
Calculating the resilient force arising during the deformation of the body, according to the law of Hooke.According to him, the elastic force is equal to the stiffness of the body in the variation of the deformation of the body.According to Hooke's law, occurring at a certain deformation of the body or a substance elastic force is directly proportional to the elongation of the body, and it is directed in the opposite direction in which the particles move of the body relative to the other particles at the time of deformation.
display certain body stiffness or proportional coefficient depends on the material used for the manufacture of the body.Also stiffness depends on the geometric proportions and shape of the body.With respect to the elastic force there is such a thing as a mechanical stress.So stress is the ratio of elasticity module power per unit area at a given point the section under consideration.If you link Hooke's law with a voltage of this type, it will sound slightly different wording.Tension mechanical type which occurs in the body during its deformation, is always proportional to elongation of the body.It must be borne in mind that the law of Hooke is limited only by small deformations.There are limits to the strain under which the law operates.If they will be exceeded, the elastic force will be calculated on complex formulas, regardless of Hooke's law.
