Enunciado

Na Figura P10.62, seja V 0 = 1 m s   e   y 0 = 1   m . Se o escoamento sobre o topo da elevação for exatamente crítico ( F r = 1,0 ) , determine a altura h m á x da elevação.

Passo 1

E bora lá!

Vamos usar novamente a equação de energia 10.39,

y 2 3 - E 2 y 2 2 + 1 m s 2 9,81 m s 2 = 0

em que,

E 2 = 1 m s 2 9,81 m s 2 + 1 - h m á x

Tendo,

F r 2 = V 2 g y 2 = 1

Por iteração conseguiremos encontrar que,

h m á x = 0,35   m

Resposta

h m á x = 0,35   m

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