A fireman is holding a nozzle at the flange as shown in the figure. The nozzle is connected to the water source through a pipe with area A1. The water with density of Pw and volume flowrate of Q is discharged to the atmosphere from the nozzle through an area of Az. Connected to the water source A Discharge to A, atmosphere flange Ignoring the weight of the nozzle and water, derive an equation for the force the fireman should withstand (Fs in the opposite direction to flow), to hold the nozzle stationary as a function of pw. Q, Az. Az, P2, P2. All the frictional losses can be ignored. Consider that the pressure of the water on sections 1 and 2 are P, and P2. respectively. Consider gage pressures only. Based on your result, what happens to Frif Az decreases while the flowrate remains a constant? Use the Bernoulli's equation to find out Ps, P, in terms of the velocities vs and vz