A hydraulic lift works by using an incompressible liquid to multiply the effects of the force applied to lift something very large or heavy. A larger surface area requires a smaller amount of force to do the same amount of work.Continue Reading
A hydraulic system generally contains two pistons that are connected by a tube. The pistons and the tubes are filled completely with an incompressible fluid like water or oil. If the pistons have the same diameter, then the force applied on one piston to push it down by a certain distance is the same as the force that lifts the second piston up by the same distance. Since the fluid is incompressible, very little energy is lost to friction.
The relationship between force and the surface area of the piston is defined by the equation Force = Pressure x surface area. The pressure is constant due to the incompressible nature of the fluid. If one of the pistons is built to have a larger surface area than the other piston, then the effect of the force can be multiplied by the same factor as the increase in area of the piston. For example, if a hydraulic system is built where one of the pistons is ten times larger than the other, then moving the smaller piston over 10 meters with a certain amount of force will allow the bigger piston to move by one meter for the same force. Despite the trade off in the distance moved, the force can be used to lift bigger objects.Learn more about Motion & Mechanics
A rotary vane vacuum pump works by using centrifugal force to turn blades against the circular surface of a cylinder whereby pockets of air are pushed from an inlet port to an outlet port as air pressure increases. Air pressure changes from the inlet port to the outlet port because the volume of air decreases inside the cylinder when the blades turn.Full Answer >
The force that slows down the movements of an object through a liquid or gas is known as drag, or air resistance. In some cases, this force is also referred to as friction, but classically, friction occurs in solid objects.Full Answer >
Buoyant force is directly proportional to the density of a liquid or any fluid in general. This relationship can be represented by the equation Fb = dgv, where "Fb" denotes the buoyant force, "d" indicates the density of a fluid, "g" represents the acceleration due to gravity and "v" is the volume of the submerged object.Full Answer >
Buoyancy is the upward force acting on an object while it is as least partially submerged in a liquid. The buoyancy force can be calculated by multiplying the pressure by the area of the object. This is partially why a large, heavy object like a ship can float.Full Answer >