Px in horizontal direction (about fluid mechanics)

[dodonaomik]

1. Plot Px in horizontal direction about three quarters of cylndrical surface ABCD
Px: horizontal force in unit length

2. formula: P=ρgh3. my question:
①Why does Px point at the right?

③What does the blank mean? Because ABCD is only 3/4 of a circle surface?
Thank you very much

 

[nilesh_pat]

.1. The plot of Px in the horizontal direction along the three quarters of cylindrical surface ABCD looks like a curved line, with the highest point at the right end and the lowest point at the left end.2. The formula for the pressure is P=ρgh, where ρ is the density of the fluid, g is the acceleration due to gravity, and h is the height of the fluid.3. The blank in the question refers to the fact that the cylindrical surface ABCD is only 3/4 of a circle, so the pressure would be higher at the right end of the surface than at the left end. This is because the pressure increases with depth, and the right end of the surface is deeper than the left end.