# The law of inertia.

Certain processes and phenomena accompanying us all the time about the nature and causes of which we do not even think, a deeper examination may be an inexhaustible source of information on laws and regulations that govern the entire physical world.

It would seem that the similarities between the object resting on the ground and perform a rectilinear uniform motion?The laws of motion are interested in more ancient thinkers."Physics" of Aristotle, dating back to IV century BC, contains a conclusion about the nature of ancient Greek philosopher and peace movements.In practice, following the right path in an attempt to explain this phenomenon, and it makes a very interesting conclusion, in his next work "Mechanics".Aristotle completely abandoned the use of the term "absolute emptiness" and concluded that any movement must be a permanent impact on the subject of certain forces.He points out that with the termination of the impact forces and the movement stops.Thus, the thinker, is on the verge of having to describe the law of inertia, I followed the wrong path.

took two millennia of human thought, to call into question the conclusions of Aristotle.Italian physicist and philosopher, engineer and astronomer Galileo Galilei found shortcomings in the adopted official science of the time interpretation of the nature of motion.Galileo's law of inertia is almost completely corresponds to the modern explanation, but it is noteworthy that for his statement and proof it was impossible to use experimental basis because of the lack of ideal conditions.This inference Italian thinker carried out on the basis of personal observations, by following the contrary, and using the method of exclusion.

Thus, the law of inertia is practically the brainchild of Galileo, although used by modern science in the Cartesian interpretation.Another merit of the great Italian is a reference to the fact that free movement is possible not only in a straight line, but a circle.In practice, this assumption is it possible to describe a rotary motion by inertia.The law of conservation of moment of inertia is a logical continuation of Galileo's findings.

Subsequently, the Englishman Isaac Newton created a system of laws of mechanics.He turned on the law of inertia in the system as the first.But science does not stand still - for the lifetime of the Newtonian system, she repeatedly criticized and attempts to revise the postulates incorporated in it.

twentieth century, became a period of radical revision of traditional laws under the influence of Einstein's discovery has made certain amendments to the interpretation of the fundamental laws of mechanics.But for practical use, engineering calculations and design of mechanical systems are still used conclusions and formulas of traditional mechanics.

When we use in practice, the law of inertia, when carrying out the calculations necessary to make a number of assumptions.To achieve the full existence of an inertial system is virtually impossible.Often when calculations easier to make the system as non-inertial, which makes it impossible to use Newton's laws.Considering some frame of reference with respect to the machine, for which we take the car itself, we can use the law of inertia, as long as the car is stationary or in uniform motion.When accelerating and braking, the system of reference completely loses its inertial properties.

can cite many examples of when you have to in order to obtain the result of a simple way to lose the factors, although of importance, but has no significant effect on the final outcome.Modern mechanics readily admits such liberties, but for more accurate calculation requires consideration of several factors due to the introduction of various factors and amendments.