Question

An incompressible fluid of density r flows
through a horizontal pipe of radius r and then
passes through a constriction of radius r/2 . If the
fluid has pressure P0 and velocity u0 before the
constriction, the pressure in the constriction is
(A) 2
0 0
15
2
P - ru
(B) 2
0 0
3
2
P - ru
(C) 0
4
P
(D) 2
0 0
3
2
P + ru
(E) 2
0 0
15
2
P + ru