When calculating hydrostatic force on a plane you have to realize that the pressure along the plane can change based on its relationship to the fluids depth. To calculate the resultant force equation 1 would be used. Also, to find the location of the resultant force on the plane equations 2-3 would be used.

**(Eq 1) ** $F_R=γh_cA$

**(Eq 2) ** $X_R=\frac{I{xyc}}{y_cA}+x_c$

**(Eq 3) ** $Y_R=\frac{I_{xc}}{y_cA}+y_c$