Is There Upthrust on a Smooth Object on a Smooth Ocean Floor?

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SUMMARY

The discussion centers on the concept of upthrust experienced by a perfectly smooth object resting on a perfectly smooth ocean floor. Participants conclude that without water beneath the object, there is no upward pressure to create upthrust, resulting in only downward forces from the water above. The notion of molecular space is also explored, suggesting that if the object and floor are truly smooth, they may effectively become one, negating any potential for upthrust. The conversation highlights the critical relationship between pressure, surface smoothness, and buoyancy.

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ponjavic
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would there be an upthrust or not if a perfectly smooth object was on a perfectly smooth ocean floor?

I expect that since there is no water beneath the object there is no pressure to provide an upthrust, there would only be pressure above the object creating a downward force!?
 
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If you're saying there is no room for even a molecule to get between the object and the ocean floor, then the object is actually a part of the ocean floor. And in that case, I think you're right - the 'object' would be held down by the water pressure.
 
and if there would be room for just one molecule?
Does the fact that they are perfectly smooth mean that there is no room for the molecules?
 

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