Hydraulics is a branch of engineering that deals with the mechanical properties of liquids. It involves the use of pressurized fluids to generate power and control machinery. Common applications include hydraulic lifts, braking systems, and excavators, which utilize the principles of fluid dynamics to perform work efficiently. The fundamental concept of hydraulics is based on Pascal's principle, which states that pressure applied to a confined fluid is transmitted undiminished in all directions. This principle allows for the design of systems that can amplify force, making it essential in various industries, including construction and automotive engineering.