Downloaded from https://www.everyspec.com FM 1-509 either piston 2, 3, or both to move upward. This momentarily lowers the pressure in cylinders 2 and 3; in cylinder 1, it is still 5 psi. An unbalanced condition such as this cannot last. Fluid will flow from cylinder 1 to cylinders 2 and 3. This happens because pistons 2 and 3 are not confining the fluid as long as they move upward. Pascal’s law does not apply to this condition. When pistons 2 and 3 reach the end of their strokes, the fluid stops flowing. At this point, the fluid is again confined and the pressure equalizes--Pascal’s law applies once more. Mechanical Advantage.
A mechanical advantage is a small force that is used over a great distance to get a great force over a short distance; in other words, it is the amount by which the input effort is multiplied in the output of a device. Using a claw hammer to remove a nail from a two-by-four board or using a jack to raise a vehicle is an example of the 1-6