1. The problem statement, all variables and given/known data Calculate the total force the Oahe Dam, placed on a structure by the reservoir behind it (in pounds and Newtons). Oahe Dam: height=75meters, width=2835meters 2. Relevant equations Pressure = Force / Area Force = Pressure x Area Hydrostatic Pressure: Atmospheric Pressure + (Density x Gravity x Height) Density of Water= 1000kg/m^3 Gravity= 9.81 m/s^2 3. The attempt at a solution - I can use Calculus on this, I know that... but I'm not in calculus yet, so I'm attempting to solve algebraically at least. - I understand that pressure increases as the depth increases... so pressure isn't the same in all levels (right?) What I tried doing is calculating pressure using (density x gravity x height) in every height... For example, (1000*9.8*1m) + (1000*9.8*2m) + (1000*9.8*3m)... so forth until I reach 75m. Then I found force by using F=P*A... the area would be (75m * 2835m) & I get a total of 5.94 x 10^12 N as the force BUTTTTT. I think the force is too high... =/ I should also consider atmospheric pressure, but I don't know where to include that (if I even should!) PLEASE HELP MEEEE!!