The pressure of solids in nature

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2018-03-19 23:43:08

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The Pressure of solid bodies, it is primarily the first enemy builders. Due to the fact that there is the pressure of solid bodies, it is impossible to implement some projects in principle. Interestingly, ancient, on the contrary enjoyed this property, creating magnificent buildings. The pyramids and many other monuments - all results of hard work in creating magnificent masterpieces. Consider that the pressure is relatively solid.

Was Found back in those days the pressure formula solids reads:

P = F/S

I.e. the force acting on a surface is the pressure of the object.

It is Worth noting that in fact, the pressure force of the body is always positive and acts in both directions. Here is Newton's First law - force of action is equal and opposite reaction. Applicable to life - the pressure that the weight of the building will be the same for its lower layers and Foundation. Therefore, the designers, the builders always count, whether will sustain the Foundation of a building. Of course, in this calculation includes other factors (wind strength, from roofs, groundwater, seismic activity, etc.).

Why a person need to disperse your weight over a larger surface? And then remember the needle or the knife. Both has a sharp part, for better penetrating power. Now, remember the skis and track-type tractors. Skiers don't sink into the snow, and tractors have good permeability through the swamps, as they have a large contact area for less pogruzhaet. This displays the basic formula indicating the pressure of solid bodies - for the same strength but of different sizes, the pressure will be different. It will be inversely proportional to the square. I.e. the larger the area, the greater the pressure. And Vice versa.

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Now back to the builders. Why do they have the same pressure - a big headache? The thing in the same area. After all, the stronger the material, the worse it is. Remember the heavy concrete slab floors. Of course, nowadays, there are many durable and lightweight materials. But it is not all easy. Any construction project estimated cost. But if the price of such super-high materials, and construction estimate will be large. As a result, either the customer will not pull for Finance, or the project will pay off for a very long time. But we said above that the ancients used the pressure of solids in their favor.

In those days building materials were quite limited in range and quantity. Because the mining industry was not, and the stone was carved by hand. The connecting elements of the type of concrete or mortar was not there. Had to use instead of fastening the pressure of solid bodies. the fact is that the greater the pressure, the greater the required strength of materials. But on the other hand, it's a great friction force. As it may be of great value. The result is that fasteners were not needed, all held together by gravity and the force of friction.

Now imagine the pressure of having the train on the rails - 300000 kPa!!! When pressure specialized crawler tractor - 20 kPa. Quite an interesting point, it would seem that the heavy swamp tractor, creates a relatively low pressure on the ground. This allows him to move around impassable terrain and swampy areas due to the wide tracks. If we talk about the above mentioned friction, it can be of different types and is determined by the formula:

F = µ×N, a [N]

Where F is the friction force [N]

µ - coefficient of friction

N - the normal reaction of a [N].

The pressure as you can see, has both positive and negative moment. Nature has adapted to this phenomenon. People of genius are simple structures moved to the invention of new materials and technologies. This phenomenon in nature and it must be considered.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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