Buoyancy.pdf

# Buoyancy.pdf - Archimedes Density • Density = Mass Volume...

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Archimedes
Density Density = Mass / Volume Density of water: 1 g/cm 3 = 1000 kg/m 3 Density of ice: .9167 g/cm 3 = 916.7 kg/m 3 Density of lead: 11.34 g/cm 3 = 11340 kg/m 3 Things that are less dense than water will tend to float in water, dense objects do not

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Buoyancy An object’s buoyancy may be defined as its ability to float.
Buoyant Force The force that is responsible for lifting an object that is immersed in a liquid is called the “buoyant force”. B = ρ f x V disp x g Buoyancy = density of fluid x volume displaced x gravity

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Buoyant Force B = ρ f x V disp x g Buoyancy = density of fluid x volume displaced x gravity Therefore an object is supported in water by a force equal to force of gravity that would have been acting on the water that the object is now displacing. Huh?
Buoyant Force Imagine you have a big container of water. Inside that container you look at just a little cube of volume, let’s say 5 cm 3 .

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