- #1
adam640
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Homework Statement
Water enters a pipe and goes through a bend with a contraction from 40mm to 25mm then into the atmosphere.
What is the horizontal force required to hold the pipe in place?
Homework Equations
I have either been given the following or have calculated them using the standard formula, I am confident that they are correct.
Q = 0.01m3s-1
A1 = 1.26 x 10-3m2
A2 = 4.91 x 10-4m2
u1 = 7.94ms-1
u2 = 20.37ms-1
p1 = 31.52Pa
p2 = 207.47Pa
θ = 60°
ρ = 1kgm-3
m = u1A1ρ = 0.0100044
The Attempt at a Solution
Fx = p2A2cosθ-p1A1-m(u2cosθ-u1)
Using the above equation that I found from a few online sources I get the result:
-0.011241193N
So does this mean I multiply my answer my -1 to make it positive and this is the final result? Or have I gone wrong in my equation?
Any help is appreciated,
Adam