$3\mathrm{.}54$ A gravity$-$type masonry dam, as shown, depends on its own weight for stability. There is a horizontal force due to the pressure of the water acting on a section of the dam having a width of $1$ ft $($into the page$).$ The vertical force represents the weight of a $1-ft$ width of section. Find the resultant of these two forces and locate the point where its line of action intersects the base $AB$ of the dam. This point should fall within the middle third of the length $AB.$ Does it$?$