For the figure shown, the firefighter projects water from the
hose at an angle of 50 degrees at a height of 3 ft from the ground
at a horizontal distance, d, away from the wall. At a safe maximum
distance, d, the projected water hits the wall at a height of 25 ft
from the ground as shown in the figure. The speed of the water that
the hose nozzle is 50 ft/s.
1. At safe distance, d, the minimum velocity required for
the water to reach the bottom of the wall is _____ ft/s.
2 Using the minimum velocity, at what height,
h1 in ft, should the fireman hold the hose so that
the water will hit the wall at 10 ft from the ground.
B
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