Find the resultant of the two forces acting on the dam Locat
     Find the resultant of the two forces acting on the dam. Locate where the line of action of the resultant passes through the bottom of the dam.   
  
  Solution
Rx = 44.1 kN ; Ry = - 150 kN
Resultant , R = sqrt(Rx^2 + Ry^2)
= sqrt( 44.1^2 + 150^2) = 156.35 Nt
calculating moment of forces
Righting moment : RM = 150( 4 - 1.5) = 375 Nt-mt
Overtunring Moment : OM = 44.1*1 = 44.1 Nt-mt
Moment at the base = RM - OM = 375 - 44.1 = 330.9 Nt-mt
Location of Ry as measured from the toe
150*x = 330.9
x = 2.206 mt

