Final answer:
The hydraulic jack represents Pascal's principle, which states that a change in pressure is transmitted undiminished in an enclosed fluid. This principle is the foundation of hydraulic systems used in various applications such as car brakes and hydraulic jacks.
Step-by-step explanation:
The hydraulic jack represents Pascal's principle. Pascal's principle states that when a change in pressure is applied to an enclosed fluid, it is transmitted undiminished to all portions of the fluid and to the walls of its container. This principle is the foundation of hydraulic systems, which are used in various applications such as car brakes and hydraulic jacks. For example, in a hydraulic jack, a small force applied to a small piston is multiplied and transmitted to a larger piston, allowing for the lifting of heavy objects.