Force - A push or pull acting upon a body. In a hydraulic cylinder, it is the product of the pressure on the fluid, multiplied by the effective area of the cylinder piston. It is measured in pounds or tons. Friction - The resistance to fluid flow in a hy- draulic system.
temperature increase The pressure of a contained sample of gas can be increased by increasing its temperature, or by decreasing its volume, or by injecting additional mas â¦ s into it.
This means that as the pressure decreases, the volume increases, and as the pressure increases, the volume decreases. One way to think of this is if you push on a gas by decreasing its volume, it pushes back by increasing its pressure. This relationship is called Boyleâs Law and makes up part of the ideal gas law.heory When the volume of a gas shrinks, the gas molecules have less space to move around and so they hit their container more often. The more frequently the gas impacts the container walls, the higher the pressure. So, as volume decreases, the pressure increases.