1. The problem statement, all variables and given/known data Find height (h) of the water level which can result in failure of dam by tipping it over due to water pressure at U/S of dam. Also draw the free body diagram. Density of water to be = 1000 kg/m^3 and its specific weight=62.4 lb/ft^3 Hints: The specific weight of concrete is = 150 lb/ft^3. Width of dam = 1ft. 2. Relevant equations Fr = (Specific Weight)(Height to Centroid)(Area) 3. The attempt at a solution I've thought about rearranging the Fr equation so that I get h = Fr/(Specific Weight * Area) But the part where I'm confused is where to get the Fr from. I thought that I could get Fr for the concrete by using 150 lb/ft^3 for the specific weight (12ft * 1 ft*) As the Area If I were to go about it this way(which I'm not even sure if it is right) how would I go about finding the height to the centroid? I tried to draw the free body diagram and I know that the pressure due from the water is in a prism-like shape as shown, but this is all I have. The resultant force from the water is also shown on there. I hope I used the template right! If anyone could help me on this, I would really appreciate it!