Which principle states that an increase in fluid speed occurs with a decrease in pressure or potential energy?

Bernoulli's Principle is a fundamental concept in fluid dynamics that describes the relationship between the speed of a fluid and its pressure. According to this principle, as the speed of a fluid increases, the pressure within that fluid decreases, assuming the flow is steady and there are no external forces acting on the fluid.

This relationship can be understood through the conservation of energy concept applied to fluid flow. In a closed system, the total mechanical energy of the fluid remains constant. As a fluid accelerates, its kinetic energy increases; consequently, this increase must be offset by a decrease in pressure energy, leading to a drop in pressure. This principle has practical applications in various engineering fields, such as aviation (where it explains how wings generate lift) and various fluid transport systems.

By recognizing how Bernoulli's Principle operates, it helps to predict and understand fluid behavior in real-world situations, making it essential for engineers to apply this concept in their designs and analyses.