Buoyant Forces Are Everywhere

Classical Mechanics Level 2

In 212 B.C., Archimedes discovered the law for buoyant force:

Any object immersed in a fluid experiences an upward force equal to the weight of the fluid displaced by the object.

Although this phenomenon is most apparent in the case of liquids, it holds true for gases as well.

Buoyant force acts on us all the time, since we displace the air around us. Estimate the buoyant force experienced by the average human being standing at sea level, surrounded by air.

Assume that the density of air is \(1.23 \text{ kg/m}^3\).


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