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Homework Help: Velocity of water from a hose using projectile motion experiment

  1. Jan 23, 2014 #1
    1. The problem statement, all variables and given/known data
    I'm doing an experiment where I'm trying to determine the velocity of a hose when fully turned on using projectile motion. I projected the hose at different angles (15,30,45,60,75,90 degrees) doing 3 tests on each 1. Here is an example I made with the a set of results -

    At an angle of 15 degrees from the ground, a hose is turned on. It has a time of flight of 0.4 seconds and a horizontal range of 2.47 meters.

    2. Relevant equations
    horizontal range = v * cos θ * t

    3. The attempt at a solution
    Horizontal range = v * cos θ * t
    2.47 = v * cos 15 * 0.4
    v = 2.47 ÷ (cos 15 * 0.4) = 6.392830414 m/s

    Is this the TOTAL velocity of the water coming from the hose?
  2. jcsd
  3. Jan 23, 2014 #2


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    Homework Helper

    hi Ben, welcome to physicsforums :) yep, that's right, v is the total magnitude of the velocity of water coming from the hose. That's why you used the cos θ to get the horizontal component.
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