sentences:  In order to stay afloat and avoid sinking there is an opposed force acting against the body known as the hydrostatic pressures.The forces acting on the body must be of the same magnitude and same line of motion in order to maintain the body at equilibrium.This description of equilibrium is only present when a freely floating body is in still water, when other conditions are present the magnitude of which these forces shifts drastically creating the swaying motion of the body.