A fluid is a state of matter that is susceptible to shearing or sideways forces. Fluids include both liquids and gases. The physics of stationary fluids is known as fluid statics. The study of all fluids in static and dynamic settings is included in the discipline of fluid mechanics. Fluid mechanics is a branch of continuous mechanics that studies the interaction of forces, movements, and statical states in a continuous medium. Surface tension, fluid statics, flow in enclosed bodies, flow round bodies (solid or otherwise), flow stability, and other topics are covered in this research area.