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Calculating velocity of water flow form tap

  1. Apr 1, 2014 #1
    1. The problem statement, all variables and given/known data

    A measuring cylinder collects 475 mL of this
    water in a minute. At the top the diameter of the stream is 0.700 cm.

    2. Relevant equations

    What is the velocity of the stream 20.0 cm below the top?
    3. The attempt at a solution
    im not sure which formula to use?
    i was thinking v=√2gh
  2. jcsd
  3. Apr 1, 2014 #2


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    Staff Emeritus
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    Homework Helper

    You are given a known volume of water which collects in a given amount of time in a graduated cylinder with a known diameter. Why do you think v = SQRT(2gh) is the appropriate formula to use? Do you have the necessary information to even use this formula?
  4. Apr 1, 2014 #3

    rude man

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    First, get the velocity of the water at the top.

    Then figure out how much the velocity changes 20 cm. below the top.
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