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Q: The sluice gate in Fig can control and measure flow in open channels. At sections 1 and 2, the flow is uniform and the pressure is hydrostatic. The channel width is b into the paper. Neglecting bottom friction, derive an expression for the force F required to hold the gate. For what condition h2/h1 is the force largest? For very low velocity 2 V1 < gh1,="" for="" what="" value="" of="" h2/h1="" will="" the="" force="" be="" one-half="" of="" the="" maximum?="">
