Presses, lifts, etc. I understand that they work on the basis of liquids being extremely difficult to compress, but how does a closed hydraulic system actually work? How are tens of thousands of PSIs actually generated?
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When there is a large surface area on one side pushing onto a liquid, the liquid pushes all that energy into the same direction the large surface is pushing it into. On the other side of that liquid, if there is another surface but that surface is smaller than the one originally pushing, the smaller surface will have more force per unit of area because the smaller surface area will have the SAME amount of force being exerted on it as the bigger area BUT the smaller area surface has less surface area to distribute the force so the smaller surface area (other part of the piston/hydrolic/ can have an incredible amount of force per square unit compared to the larger surface. In other words we take a bunch of energy that is easily applied to a large area and force that energy into a smaller area so that smaller area (using liquids in-between) has a larger ratio of power than the bigger one.
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