California State Polytechnic University, Pomona

The 8 ft height of the vertical wall would be equivalent to a (5/4)(8 ft) = 10 ft slanted distance to the surface of the water. The angle, , that the slanted length makes with the surface of the water is sin-1(4 ft/5 ft) = 0.9273 radians. The slanted length to the centroid of the gate would be yc = 10 ft + 2.5 ft = 12.5 ft. ................
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