Effects of buoyancy on body of different weight ?
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Answer:
There is a net upward, or buoyant force on any object in any fluid. If the buoyant force is greater than the object’s weight, the object will rise to the surface and float. If the buoyant force is less than the object’s weight, the object will sink. If the buoyant force equals the object’s weight, the object will remain suspended at that depth. The buoyant force is always present whether the object floats, sinks, or is suspended in a fluid.
It offsets it by an amount equal to the weight of the fluid displaced. This is the basis of Archimedes principle.
It's worth noting that for a submerged object, this can exceed the weight of the object and, therefore, result in a net negative weight which serves to force the object upward.
It's equally important to note that this doesn't just apply to liquids as, for example, helium balloons are buoyant in regular air…at least until they rise to the altitude at which their weight equals the weight of rarefied air that they have displaced (at which point they will continue to float aloft, they just won't rise anymore).