Thursday, June 4, 2015

buoyancy - Why this is not a perpetuum mobile



perpetuum mobile


If we imagine a device like one shown on the picture above, why can't we say that it would work? Here is a cylinder somehow placed in the fluid by one of his sides (one in the box). Due to additional buoyant force on the right, we should have it rotating counterclockwise, but this doesn't happen. Why? Could you explain.




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