FLUID, a LIFT is generated due to the net VERTICAL component of hydrostatic pressure FORCES experienced by the body.This lift is called the buoyant force and the phenomenon is called buoyancy.Archimedes principle:The Archimedes principle states that the buoyant force on a submerged body is equal to the weight of the liquid displaced by the body and acts vertically upward through the centroid of the displaced volume.Thus, the net weight of the submerged body, (the net vertical downward force experienced by it) is reduced from its actual weight by an amount that equals the buoyant force.FB = ρghA = ρgVLoss in weight is due to the upward buoyancy force.Buoyancy force = ρgVwhere ρ is the density of the liquid, V is displaced volume.Since ρ, g is constant for the same weight loss, the object must have an identical volume.