4.32 A fire truck is equipped with a 66 ft long extension ladder which is attached at a pivot and raised to an angle of 45 . A 4-in.-diameter fire hose is laid up the ladder and a 2-in.-diameter nozzle is attached to the top of the ladder so that the nozzle directs the stream horizontally into the window of a burning building. If the flow rate is 1 ft3 s, compute the torque exerted about the ladder pivot point. The ladder, hose, and the water in the hose weigh 10 lb ft.