First, a bag of water is packed in a light plastic bag, and the gravity of the water is measured by a spring At this time, put it into a cylinder of water at a constant speed, and the indication of dynamometer changes? (I think it should be kept unchanged. After all, the density is equal, so there is no pressure difference.)

First, a bag of water is packed in a light plastic bag, and the gravity of the water is measured by a spring At this time, put it into a cylinder of water at a constant speed, and the indication of dynamometer changes? (I think it should be kept unchanged. After all, the density is equal, so there is no pressure difference.)

The indication of spring dynamometer is 0. Because the gravity of water is equal to buoyancy, there is no need to pull it. It has nothing to do with the pressure difference