Archimedes Principle March 30, 2020April 25, 2013 by Whatsapp Cikgu Kwee now! Archimedes PrincipleArchimedes Principle states that when a body is wholly or partially immersed in a fluid it experiences an upthrust equal to the weight of the fluid displaced.Upthrust/Buoyant force is an upward force exerted by a fluid on an object immersed in it.Mathematically, we write F=ρVg F = Upthrust/Buoyant Force ρ = Density of the liquid V = Volume of the displaced liquid g = Gravitational field strength