👉 Fluid, whether it's water or air, is subject to various forces that govern its behavior and movement. These forces include pressure, which is the force exerted by the fluid's molecules on its surroundings and each other; viscosity, a measure of a fluid's resistance to flow; surface tension, which arises from cohesive forces between fluid molecules at the surface, causing them to minimize their area; and gravitational force, which affects the fluid's motion due to its weight. Additionally, fluid dynamics introduces concepts like drag, which is the resistance a fluid exerts on an object moving through it, and buoyancy, the upward force exerted by a fluid that opposes the weight of an immersed object. Together, these forces determine how fluids flow, mix, and interact with their environment.