Hydrostatic Thrust
On a Plane Surface
Acts normal to the surface on the point on the surface known as the Centre of Pressure with a magnitude of:
Centre of Pressure
Here:
- Total submerged area - Distance to centre of pressure measured along the submerged surface from the free surface - Distance to measured along the submerged surface from the free surface - Second moment of submerged area about the centroidal axis parallel to the free surface
Proof
Direction
All forces acting on the surface is normal to the surface. Therefore
Magnitude
Line of action
On a Curved Surface
Proof
For the equilibrium of the fluid volume
For the equilibrium of the fluid volume