1. The problem statement, all variables and given/known data There is a ship of mass M floating on a river. The upper portion of the ship has a uniform cross-sectional area A and the density of water is d. Now the ship is displaced a further depth y into the water and released. What is the resultant force acting on the ship when it is displaced a further depth y into the water? 3. The attempt at a solution d = m / v where m is the mass of water and v is volume of water being pushed by ship m = d (A*y) net F= Mg - mg net F= g [ M - d (A*y) ] The correct answer is F= - dgAy. Why isn't the weight of the ship taken into account? Thank you so much!