Pressure - a ratio of the force which acts perpendicularly to the surface to the area of this surface.Measured pressure in Pascals (Pa 1 - a pressure that force of 1 newton produces when it is applied to a surface area of one square meter).
pressure force - is a force which exerts pressure on a certain surface.It is measured in Newtons (N 1).The smaller the surface area over which the pressure is, the lower may be applied force, which can be used to achieve the desired effect.
pressure force acts perpendicular to the surface.It can not be equated with the pressure.To determine the pressure necessary to force it divided by the surface area on which it appears.If we apply the same force to act on the surface of various sizes, the pressure will be greater where there is less support area.If you know the pressure and surface area, the pressure force can be found by multiplying the pressure on the area.
strength of normal pressure is always necessarily perpendicular to the surface on which it has an impact.According to Newton's third law it is equal to the reaction force support for its module.
role of the pressure force is able to play any force.This can be a weight, which deforms the bearing or force pressing any of a particular body surface, and so on.
In contact with solids liquid act on them with a certain force, which are called - the pressure force.At home feel the impact of such a force can, covering the hole with your finger tap from which the water comes.If the rubber bulb pour mercury, you can see that its wall will bulge outward.The pressure force of fluid can also affect other liquid.
case of contact solids elastic force occurs when changing their shape or size.In liquids such forces by changing the shape does not occur.The lack of elasticity with respect to changes in the shape causes fluid mobility.When you compress the liquids (changes thereto) elastic forces will manifest themselves.They are called the power of pressure.That is, if the liquid acts on contact with her other body with a force of pressure, then it is compressed.The more compressed fluid, the stronger will result from this pressure force.
As a result, the compression increases the density of the substance, so liquids have elasticity, which manifests itself in relation to their density.If the vessel to close the piston and place on top of the load, the piston is lowered liquid will start to shrink.It occurs pressure force that counterbalances the weight of the piston with its load.If we continue to increase the load on the piston, the liquid will continue to shrink and increasing the pressure force will focus on load balancing.
All liquid (more or less) can be compressed, so it is possible to measure the degree of compression, which corresponds to a certain pressure force.
To reduce pressure on the surface, if it is impossible to reduce the force necessary to increase the bearing area.Conversely, to increase the pressure necessary to reduce the area on which operates its power.
gas molecules are not linked (either too loosely connected) between a force interaction.So they move erratically, almost freely, filling the entire volume of the vessel provided to them.In this regard, the gas properties different from those of liquids.In gas density depends on the pressure to a far greater degree than liquids.Common among them is that the pressure of both liquid and gas are not dependent on the shape of the vessel in which they may be placed.