QUESTION $5$

A reducing elbow turns water through $=145$ in a vertical plane. The outlet centre is $2$ m below the horizontal inlet axis. The volume of the elbow is $0\mathrm{.}4$ m $3.$ Compute the net force of the water on the elbow when water flows at $0\mathrm{.}4m\frac{3}{sec}$ and the inlet pressure is $150$ kPa gage. Neglect viscous effects. $D1=0\mathrm{.}4m,D2=0\mathrm{.}2m,a=2m$