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If you hold a spoon with its convex side next to a column of running tap water, it will be drawn to it, but does this apply to moving ships, where the hull is rounded like the spoon, and the water is moving under it is sped up due to the curvature, therefore decreasing pressure and pulling the ship downwards?

Toby Que
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  • Your question might be as tricky as asking why airplanes fly https://physics.stackexchange.com/questions/290/what-really-allows-airplanes-to-fly/77735#77735 – Roger Wood Mar 26 '21 at 03:56
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    The force you consider here should be negligible compared with the buoyancy, and the dragging force of the water. – ytlu Mar 26 '21 at 04:24
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    https://en.wikipedia.org/wiki/Planing_(boat) says hydrodynamic lift acts to lift a boat, not pull it downwards. – gandalf61 Mar 26 '21 at 10:37
  • I was referring to ships that float from hydrostatic lift where their hulls are typically rounded, unlike planing boats where the hull is desgined more flat. I think ytlu answered it for me, but thank you too. – Toby Que Mar 27 '21 at 04:03

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