I have a question about hydrostatics, but in my understanding of the issue, the problem lies in vector analysis. That's why I decided to ask it here.
According to the theory, hydrostatic pressure acts in the direction normal to the surface. Accordingly, for a profile of a wall in the shape of a quarter circle (as shown in the attached diagram), the horizontal component at the deepest point is considered to be 0. However, I see calculations online suggesting that hydrostatic pressure can be analyzed horizontally as an increasing force from the water surface (see the attached diagram), implying that at the same point, the horizontal component has a maximum value. Therefore, these two interpretations seem contradictory to me. Can you explain why this works this way?
