Even if the magnitude of the gravitational force and the buoyancy force were equal, having a different location for the center of mass and buoyancy will mean the object (or human) won’t be in equilibrium. Here’s a quick demonstration that you can try. Take a pencil and place it on a table so that it’s pointing away from you. Now put your right and left fingers somewhere near the middle of the pencil and push them towards each other. If you push with equal force with both fingers, the pencil just stays there. Now push towards the tip of the pencil with your right hand and towards the eraser
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