What principle does Pascal's law illustrate in hydraulic systems?

Pascal's law illustrates that pressure applied to a confined fluid is transmitted undiminished throughout the fluid in all directions. This principle is essential in hydraulic systems, where it allows for the force applied at one point to be transmitted to another point, enabling lifting or moving heavy objects with relatively little effort.

In practical terms, this means that if you apply pressure to a fluid in a closed system, the pressure change will be the same at every point within that fluid, regardless of the shape or size of the container. This characteristic enables various hydraulic applications, such as hydraulic lifts and braking systems in vehicles, where a small input force can create a much larger output force.

Understanding this principle is crucial for working with hydraulic systems, as it emphasizes the importance of pressure management in design and function.