Archimedes Principle

A body immersed in a liquid

Archimedes' principle states that:

"If a solid body floats or is submerged in a liquid, the liquid excerts an upward thrust force on the body equal to the gravitational force on the liquid displaced by the body."

It can be expressed as

W = V γ

  = V ρ g     (1)

where :

W = weight (N)

V = volume of the body below the surface of the liquid (m³)

γ   = specific weight (weight per unit volume) (N/m³)

ρ = density (kg/m³)

g = acceleration of gravity (9.81 m/s²)