Buoyant Force: When an object is placed in a fluid, the fluid exerts an upward force we call the buoyant force. The buoyant force comes from the pressure exerted on the object by the fluid. Because the pressure increases as the depth increases, the pressure on the bottom of an object is always larger than the force on the top - hence the net upward force. The buoyant force is present whether the object floats or sinks. Lets consider a floating object, but the analysis is basically the same for a submerged object. Well also consider a rectangular block, although a similar (more complicated) analysis leads to the same result for funny-shaped objects.
Posted on: Fri, 25 Jul 2014 11:03:56 +0000
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