1. The problem statement, all variables and given/known data Show that the buoyant force on a partially submerged object acts at the center of gravity of the fluid before it is displaced. This point is called the center of buoyancy. 3. The attempt at a solution I need to get better at proofs, so try not to just give me the answer. But I never have any clue where to start with things like this, so I need a nudge.