Задача id10689

A pool filled with gasoline (p = 900 kg/m3) is emptied using a pipeline closed with a valve (Fig.). Calculate the force F required to lift the valve if the valve weight G = 29.4 N, pipeline diameter d = 0.4 m, height of the liquid relative to the center of gravity H = 3.5 m, lever dimensions a = 0.55 m and b = 1.3 m; a = 30°.

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