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Buoyancy
Buoyancy Buoyancy is the upward force exerted on an object immersed in a fluid. This upward force is directly proportional to the weight of the fluid displac...
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Buoyancy Buoyancy is the upward force exerted on an object immersed in a fluid. This upward force is directly proportional to the weight of the fluid displac...
Buoyancy is the upward force exerted on an object immersed in a fluid. This upward force is directly proportional to the weight of the fluid displaced by the object and is inversely proportional to the density of the fluid.
Intuitively, you can think of the buoyant force as the object pushing up on the fluid. This is why an object will float if it is less dense than the fluid. The buoyant force can also cause an object to sink if it is more dense than the fluid.
Formal Definition:
Buoyancy force (B) on a fluid of density ρ is defined as:
B = ρVg
where:
B is the buoyant force in newtons
ρ is the density of the fluid in kilograms per cubic meter
V is the volume of the fluid displaced in cubic meters
g is the acceleration due to gravity in meters per second squared
Examples:
A floating marble in still water is experiencing buoyant force due to the weight of the water it displaces.
An object will sink in water if it is less dense than the water.
A hot drink floating in a kettle is experiencing buoyant force due to the weight of the hot water it displaces