The Latin term tract came to our language as traction . Its about act and the consequence of pulling a thing with the objective of move it or to get it move . In this sense, we talk about animal traction or of blood traction to the use of an animal to drag a car, a plow or other device.
The oxen , the horses and the donkeys They are the most commonly used species in animal traction. It should be noted that, in the urban environment, blood traction is usually prohibited since it is considered cruel to the animal .
Although more and more people open their eyes every day regarding the need to respect all species equally , animal exploitation continues to be part of the reality of the whole world, of all the big cities and rural areas. It is enough to buy a product of animal origin to participate in the abuse and, since there is no country or city where only vegetable products are consumed, the solution to this great problem is very far in the timeline of our evolution .
Blood traction is a practice for many brutal and inconsiderate that exceeds the limits of our tolerance: would we put our parents, brothers or friends to pull a very heavy car? No. So, why do we use animals, even those who claim to "love"? The answer is as simple as it is alarming: because we don't consider them peers . But can we love and despise the same being at the same time? Maybe in this strange capacity The secret of our supposed superiority is hidden.
For the mechanics and the engineering , the traction is the effort to which an object is subjected when there are two forces that are opposite and tend, from its application, to lengthen or stretch it. This effort falls into the group of internal or section, a physical quantity that is used to calculate prismatic pieces (such as pillars and beams), plates and plates.
Any force that attempts to stretch a body It is complemented by a normal , that is, the force with the opposite direction to the first one and whose tension, which is applied to the sections perpendicular to the parts affected by traction, is also necessary for the phenomenon to take place.
With this in mind, it is possible to understand that all stretching is complemented by a shrink : while traction causes a positive deformation in an axis, the transversal ones usually compensate for this change With one opposite. In the case of a solid body, the deformation can be permanent if it exceeds its yield point and exhibits a behavior plastic. The body is elastic if after traction it returns to its original length.
In the field of orthopedics , traction is a procedure that is carried out in order to minimize the Pressure that is exerted on the skeleton or to achieve the bone alignment after a fracture
If we focus on the motor vehicles , is called traction to the mechanism that allows transmitting the force of the movement that makes a motor to the wheels. According to how the mechanism works, you can talk about rear wheel drive , front-wheel drive , 4 × 4 traction or double traction .
In rear-wheel drive, engine force is transmitted to the rear axle of the vehicle. If the force is transmitted to the front axle, on the other hand, there is talk of front-wheel drive. 4 × 4 traction, meanwhile, reaches all wheels , while the double traction reaches two rear axles simultaneously.