A fireman is using a 10-cm inside-diameter fire hose is trying extinguish a fire. He is aiming the hose at 45° with respect to the horizontal and the water lands 30 m from the fire fighter. On the end of the fire hose is a nozzle. The inside diameter of the nozzle is 1.0 cm. What horizontal force must the fire fighter apply/exert to the hose/nozzle to keep it from moving horizontally backwards?
{Hint: Over a one second interval, calculate the mass (and acceleration) of the water and from F=Ma, determine the x/horizontal component. Calculate the nozzle velocity by noting that the water travels 30 m.}