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Pressure: a distribution of force But what is the relationship between the density of air at the top or bottom of a mountain with the pressure? You ever heard of fakir? And in a nail bed? Or even in bed with many nails? Well, the fakir is the guy who lies in a bed with many nails! How is this possible? The fakir, is subjected to the action of force Weight. This force, of distributing over a nail, concentrate their actions in a very small area, the nail head, causing a big impact and even pain. If, however, be several nails, such a force would be distributed in them, reducing the impact on the body faquir. This is what is called impact pressure, ie force is distributed or divided throughout the surface is quantitatively defined as follows: P = F / A. The nail bed with many increases the area in which force is applied, so the pressure decreases. For example, if sobrepuséssemos two identical cubes painted in different colors of sides 10 cm, and mass 2 kg (according to Figure 2), which is the pressure exerted by the cube of the cube B? Figure The cube is placed on the hub B, an illustration of interfacial pressure. First you should know that the force acting on the cube B is the weight force of the cube, that if no one is pressing the cube A. You must also know that weight is mass times the acceleration of gravity. Therefore, the strength of the B block, supposing that the gravitational acceleration is 10 m / s , and 20 N (Newtons twenty). As each face of the cube is ten centimeters area on either side of the cube, as it has equal sides is 100 cm , so the pressure exerted on the hub hub by B is 0.2 N / cm In the case of the mountain, we can consider that the area is the same both at the top as at the base. However, we will have less air at the top than at the base, which lowers its pressure. Hence the need for adaptation of climbers.
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Pritisak: raspodjela sile No, što je odnos između gustoće zraka na vrhu ili dnu planine s pritiskom? Jeste li ikada čuli za fakira? I u nokta? Ili čak u krevetu s mnogim nokte? Pa, Fakira je tip koji leži u krevetu s mnogim nokte! Kako je to moguće? Fakira, je podvrgnut djelovanju sile težine. Ova sila, distribuiranja preko nokta, usredotočiti svoje djelovanje na vrlo malom prostoru, noktiju glave, uzrokujući veliki utjecaj, pa čak i bol. Ako, međutim, biti nekoliko čavala, kao što će snage biti raspoređene u njima, smanjenje utjecaja na tijelo fakir. To je ono što se zove utjecaj tlaka, tj. sila distribuirati ili podijeljeno u cijeloj površini kvantitativno definira se na sljedeći način: P = F / A. Nokta s mnogim povećava područje u kojem je primijenjena sila, tako da se tlak smanjuje. Na primjer, ako sobrepuséssemos dvije jednake kocke oslikani u različitim bojama strane 10 cm, a masa 2 kg (prema slici 2), što je pritiska od strane kocke kocke B? Slika Kocka je stavljen na središte B, ilustracija međupovršinske tlaka. Prvo što bi trebali znati da je snaga djelujući na kocke B je težina sila kocke, da ako nitko ne vrši pritisak na kocku A. Također morate znati da masa je masa puta ubrzanje sile teže. Dakle, snaga B bloku, misleći da je gravitacijsko ubrzanje 10 m / s2, a 20 N (Newtonovi dvadeset). Kao što svaki lice kocke je deset centimetara prostora na obje strane kocke, jer ima jednake strane je 100 cm2, tako da pritisak na hub središte B je 0,2 N / cm2 U slučaju gore, možemo uzeti u obzir da je područje isti i na vrhu na bazi. Međutim, mi ćemo imati manje zraka na vrhu nego na dnu, što smanjuje njen pritisak. Otuda i potreba za prilagođavanjem penjača.