We all know the lift force in case 1, what about case 2 ?
Note that there is also a force from the liquid pushing down on the additional wings you put in ...
Buoyant force depends only on the amount of water displaced, not the shape of the object displacing it.
If by "lift force", you actually mean "buoyancy", this can be calculated for case 2, although it is slightly more complicated than case 1.
Remember Archimedes' Principle:
Note: in technical use, "lift force" is usually reserved for a force which is created by a dynamic situation, like the lift generated by an airplane's wings when flying.
OTOH, "buoyancy" usually refers to a force created by a static situation, like the displacement of fluid by a floating object.
Thank you for answers,
?????????? To calculate the resultant force is possible, but i wonder distribution of force. ??????????
Every point on the submerged surface of the object feels a normal force proportional to the pressure at that depth ## \rho g h ##
A force can never equal a pressure, the dimensions are different. An area element is subjected to a normal force equal to the pressure multiplied by the area
Thank you all.
I wanted to steer clear of elemental areas for the sake of clarity but I take your point; I have amended 'equal' to 'proportional'.
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