A stream of water of density ρ , cross-sectional area A , and speed u strikes a wall that is perpendicular to the direction of the stream, as shown in the figure below. The water then flows sideways across the wall. The force exerted by the stream on the wall is

Question

A stream of water of density ρ , cross-sectional area A , and speed u strikes a wall that is perpendicular to the direction of the stream, as shown in the figure below. The water then flows sideways across the wall. The force exerted by the stream on the wall is, ρ u 2 A, ρ u A / 2, 3 ρ u 2 A, u 2 A / ρ

MARKS App · Accepted Answer

F = dp dt F = d mu dt = dm dt u dm dt = d dt ρAx = ρA dx dt = ρAu F = ρAu u F = ρAu 2

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