To shut off the water flow in the channel, a shutter is

To shut off the water flow in the channel, a shutter is used (Fig. 1), installed at an angle α to the horizontal and having an axis of rotation O. The water level in the upper pool (with the shutter closed) is H1, in lower H2, the height of the hinge is H3, the width of the shutter is B Determine: 1) the pressure force of the liquid on the shutter and the points of their application by analytical and graphoanalytical methods; 2) the force T required to open the shutter.
Given: α = 700; H1 = 7m; H2 = 2.2m; H3 = 0.6m; H = 5m
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