Mechanics It is a term that derives from late Latin mechanĭca, in turn from the Greek word mēchanikḗ. The concept has several uses according to context .
The mechanic is called branch of the physical focused on movement and balance of bodies that are under the influence of a force . It is, therefore, the study of the displacement and rest of objects that are subject to forces.
The concept of force it also belongs to physics and is defined as a magnitude expressed through the use of vectors to measure the rate of change of amount of movement (also called momentum momentum or linear momentum) that takes place between a pair of individual particle or particle systems. The classic definition tells us that force is any agent that can alter that amount or the shape of a material.
Currently, in the concept of mechanics we also include the evolution of physical systems (aggregates of material entities or objects that are interconnected or interacting) beyond the mass bodies, the only ones contemplated in the past. In this way, mechanics also focuses on the study of equations of motion of quantum systems and electromagnetic fields, among others, where there are no "physical bodies," precisely.
According to its characteristics it is possible to differentiate between the classic mechanics , the quantum mechanics , the analytical mechanics and the vector mechanics , among other. His knowledge also gives rise to others disciplines , as the biomechanics and the electromechanical engineering .
Classical mechanics includes that of the rigid solid and that of continuous media, among other areas of study. Continuous media mechanics takes care of bodies extensive deformable materials, and includes phenomena such as plasticity, elasticity and viscoelasticity, theories such as hydrostatics, hydraulics and hydrodynamics.
Quantum mechanics, on the other hand, focuses on mechanical systems with small energy for which classical mechanics cannot be applied. For example, it is not compatible with the principle that the future state of a system It is completely linked to the present, since its evolution can take place in a non-deterministic way. It is also possible to talk about quantum statistical mechanics, which includes certain restrictions when treating particle aggregates.
Analytical mechanics, on the other hand, is a general and abstract formulation of the classical one, thanks to which it is possible to use inertial and non-inertial systems under them terms without altering the basic motion equation.
Many times, at least in the colloquial language When it comes to mechanics, reference is made specifically to the automotive mechanic : that is, to the principles and systems that allow to generate and transmit movement in the vehicles of mechanical traction. So, expressions like "I don't know anything about mechanics" or "I must go to the mechanic" They are usually linked to the operation of a car.
On the other hand, what is executed with a machine or through a mechanism He is qualified as a mechanic. For example: "A mechanical shovel was used to remove the rock", “The new shopping center has four escalators”, "Fruit harvesting is done mechanically".
The mechanics, finally, is the set of rules what regulate an activity or an action : "According to the mechanics of the contest, the four most voted participants will classify the final instance", "At the request of the players, the coach decided to modify the mechanics of the training", "The mechanics of our work makes the last hours of the day the most intense".