Question

A fire hose ejects a stream of water at an angle of 30.9° above the horizontal. The water leaves the nozzle with a speed of 26.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the highest possible fire?

Answer 1

Vi = 26.5 sin 30.9 = 13.6
v = Vi - g t
at top v = 0
9.81 t = 13.6 at top
t = 1.39 seconds up

u = 26.5 cos 30.9
u = 22.7

d = u t = 22.7*1.39 = 31.6 meters