1. The problem statement, all variables and given/known data The Archimedian principle stetes that the bouyancy force equals the weight of the water displaced by the body (partly or totally submerged). A cylindrical buoy of diameter 60cm is floating in water tiwh its axis vertical. When dupressed downward in the water and released, it vibrates with period 2 sec. Ehat is its weight? 2. The attempt at a solution The period is 2*pi/w, so that w=pi. But what then?