Question: A river (1) passes over a drowned weir as shown, leaving at a new condition (2). Neglect atmospheric pressure and assume hydrostatic pressure at (1)

A river (1) passes over a €œdrowned€ weir as shown, leaving at a new condition
(2). Neglect atmospheric pressure and assume hydrostatic pressure at
(1) and
(2). Derive an expression for the force F exerted by the river on the obstacle. Neglect bottom friction.

Width b into paper t

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