Objects in fluids have more pressure on bottom surface than on top surface {buoyancy}|, because bottom surface is deeper in fluid. The greater force on bottom pushes object up. Buoyancy equals difference between object-bottom pressure and object-top pressure. Buoyant force is in opposite direction from gravity. Objects that sink have more force than fluid weight pushed up. Objects that sink are denser than fluid.
Physical Sciences>Physics>Dynamics>Fluid>Buoyancy
5-Physics-Dynamics-Fluid-Buoyancy
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Date Modified: 2022.0224