friction force is a process in which the interaction of bodies in their motion, carried out with respect to each other.This may be offset, the body motion in the liquid or gaseous medium.There is the scientific name of this phenomenon - frictional interaction.As a rule, the study deals with the physics of friction, see "Mechanics of frictional engagement", and in some cases - tribology.
friction force is electronic in nature, but only under one condition - the substance is in a normal state.
As for the types of this phenomenon, in the presence of relative motion of the body, the force that occurs during their interaction, can be divided into:
- sliding friction is the force that occurs during the forward movement of the body relative to one another.It operates on a given body in a direction opposite to the direction of sliding.
- Rolling friction or torque.Occurs when the implementation of the rolling one of two interacting forces with respect to another.
- Static friction is a force that can arise between two touching in any way the bodies, as well as prevents the relative motion.Usually it occurs when the slightest movements or contact tel.It acts in a direction which is opposite relative motion.
As for the physics, the force of friction and interaction is divided into:
- dry when there is an interaction of solids, and they are not separated by some additional lubrication.This case is much less common in practice and has a distinctive feature - the presence of the high rate of frictional force alone.
- Boundary - this is when the contact area have layers, as well as portions of different nature.This frictional force in nature is the most common.
- Mixed - in this process contains the contact area and some parts of the liquid, and dry friction.May occur if the body immersed in the liquid, but in this case the frictional force will be characterized by viscosity medium.
- elastohydrodynamic - occurs when certain crucial internal friction material, which performs the lubricating function.As a rule, there is a strong increase in the relative speed of movement.
is worth noting that due to the complexity of physical and chemical processes that are associated with this phenomenon during the frictional engagement processes undertaken by the friction can not be described, is carried out by methods of classical mechanics.
Asked what determines the frictional force, it can be said that it is determined by the force of pressure and friction.The latter figure is directly dependent on many factors: the degree of purity, which is treated with one or other surface, the kind of the substances of which are made the bodies themselves, and if there is a speed, and then from this indicator.It is important to know that the area, which is in contact with the body, the friction force practically does not depend.
In conclusion we can say that the presence of a certain friction makes it possible to navigate on the surface.For example, during walking floor and the clutch is carried soles which just happens due to friction.As a result of this contact, the sole repelled from the floor and the man moves forward.
exact same way's implementation traction vehicle to the road.It is to improve and increase the adhesion of the specially developed new tires and tires, and racing car can be installed "splashes" that pressed hard enough car to the track.
