How does a little 50 lb tool lift a 900 lb object with just a few light pumps?
In: Physics
A hydraulic hand jack is basically a lever with savings. There are little one-way valves set up such that every big crank you give the handle results in a relatively small exchange of fluid in the hydraulic piston which stays in place when you lift the handle again. In this way, rather than having to exert 900 lbs of force over 12 inches of space, you only have to exert 45 pounds of force over 240 inches of space.
Latest Answers