Problem: An elbow connected to a $10cm$ diameter pipe and discharges water $)=(1000\frac{kg}{m^3}$ through the air as shown. The difference between the stagnation and static pressures $P$ measured by the pitot$-$static tube $=850Pa.$ The mass of the elbow and water inside it $=40kg.$ What force does the pipe exert on the elbow at the flange connection and $($:$F_y\}?$X$=8$

Assume losses are negligible.