A dam is inclined at an angle of 30\deg from the vertical and has the shape of an isosceles trapezoid 80 ft wide at the top and 40 ft wide at the bottom and with a slant height of 60 ft. Find the hydrostatic force on the dam when the water level is at the top of the dam. (Round your answer to the nearest whole number. Assume that the weight density of this water is 62.5 lb/ft3.)

A rectangular flume is 15 cm wide and 8 cm high. The freeboard is 25% of the flume height. What is the hydraulic radius in cm?

1.) Situation 11. A rectangular vertical gate, 0.60 m wide and 2.45 m high and weighing 1.78 kN, is hinged at the bottom. There is water on both sides of the gate, 4.9 m on one side and 1.80 m on the other. The gate, however, is held in place by a horizontal force F applied at the top of the gate. Under the above conditions, determine the horizontal force F and the amount and direction of the reaction at the hinge. Assume weight of water to be 9.81 kN/cu.m. W.S. 2.45 m 0.60 m B 1.78 kN 2.45 m 1.80 m P.- P: hinge