Fluid Mechanics. Chapter 8. Fluids and Buoyant Force. Section 1. Defining a Fluid. A fluid is a nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or a liquid.
FB = Fg (displaced fluid) = mfg
magnitude of buoyant force = weight of fluid displaced
A1v1 = A2v2
Area speed in region 1 = area speed in region 2