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..but I would imagine that we'd now be talking about the impact of water resistance as the object was lifted.
That sounds like it would need an explaination that included words like 'co-efficient' , 'drag' and 'velocity'.
...oh yes...and lots of wierd mathematical symbols that I don't understand
My non-academic assumption would be that shape would not determine the lift needed, but would determine the relative speed that the object would be lifted at???
If both objects have the same volume and the same density, they will displace the same amount of water. Therefore, the balance between their weight and their buoyant force will be the same. If they are buoyant, both will eventually float to the surface. However, the one which presents the greater resistance to the water will float up more slowly. If it is reoriented to present less resistance to the water, it will float up faster.
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