For a physics experiment, I'm testing the drag experienced by floating models with shape, wetted surface, and velocity as the independent variables. I placed the models in a flume tank and connected them to a hanging bucket via a string that passed over a frictionless pulley (see attached pictures). By adding or removing pennies, I sought to immobilize the bucket in the air. Once this was achieved, the drag force of each model would then be the mass of bucket + pennies x gravity. My question is can I safely assume that the drag experienced by an immobile object in flowing water is the same as the drag experienced by the same object moving through still water? Thanks in advance for any feedback.