The width of the dam (the dimension into the page) is 100 m. The mass density of the water...

The width of the dam (the dimension into the page) is 100 m. The mass density of the water is ρ = 1000 kg/m3. Determine the force exerted on the dam by the gage pressure of tire water

(a) by integration;

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(b) by calculating the “volume” of the pressure distribution.