Hydraulic Press
Definition
A machine that multiplies force using fluid pressure — a small push on a small piston becomes a crushing force on a big one.
Unit: N
Technical definition
An application of Pascal's principle: pressure applied to an enclosed fluid transmits undiminished, so F₂ = F₁·(A₂/A₁). Force multiplies by the area ratio; the small piston must move proportionally farther (energy conserved).
Example
Car brakes: your foot's force on the small master-cylinder piston becomes a much larger clamping force at the bigger brake caliper pistons.
Common confusion
Hydraulics multiply force, not energy — the small piston travels much farther than the big one moves. Pressure is the same everywhere; it is the different areas that create the force difference.