In this problem I consider no other gravity, no Earth, only mass and water. Mass of screw is very small and can be considered to 0. The black mass create pressure in water. The screw is put in water at a side, the screw turn only. The mass and water move up. Like no other gravity is present, we need 0 energy for move up the mass and the water. The screw turn with a torque in this case ? If yes, the pressure at bottom increase the weight to move ? But move a weight need 0 energy in theory (acceleration/deceleration). Like we can imagine a screw like a circle shape I think there is no torque so the pressure is not like water on Earth ? I think with a screw fixed and the water+mass turn around the screw and move up (or down) if the fact that part of screw create a force, in this case the water+mass has an acceleration ? Because the water+mass move perpendiculary to the forces, this don't need energy. But the pressure at bottom is greater. This case is also a problem with external gravity like on Earth.