1. A square gate, 4 m by 4 m, is located on the 45° face of a dam. The top edge of the gate is 8 m below the water surface. Determine the resultant force of the water on the gate, and the point through which it acts.
2. A long, vertical wall separates seawater from fresh water. If the seawater is 7 m deep, what depth of freshwater is required to yield a zero resultant force on the wall? When the resultant force is zero, will the net moment on the wall due to fluid forces also be zero? Explain.