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Posted by on Wednesday, September 19, 2012 at 1:21am.

A fire hose ejects a stream of water at an angle of 31.5 ° above the horizontal. The water leaves the nozzle with a speed of 24.3 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?

  • physics - , Wednesday, September 19, 2012 at 8:05am

    If the hose elevation angle remains 31.5 degrees, the maximum height obtained for the water stream is
    H = (Vo sin31.5)^2/(2g)
    = 8.22 m

    The stream reaches that height when the distance from the building is
    H cos31.5 = 7.01 m

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