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Water falling out of an upturned bottle.

  1. Nov 5, 2011 #1
    1. The problem statement, all variables and given/known data
    A bottle is filled with water and turned over so it is 90° to the horizontal, the cap is then removed and the water will pour out.

    At what rate will the water accelerate? (Ignore friction with air)
    A. Less than g
    B. equal to g
    C. more than g

    2. Relevant equations

    3. The attempt at a solution

    I think it should be C as the water is being forced out of a smaller opening so it should have some acceleration caused by the pressure and therefore it will be greater than g?

    The answer is B in the back of the test paper?
  2. jcsd
  3. Nov 5, 2011 #2


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  4. Nov 5, 2011 #3
    the fall of any matter connot exceed G unless you use a propelant. The bottle empties of water at the standard rate and unless its magic it fills with air. so heres the trick where are you conducting the experiment......I ask this because waters Characteristics change dramaticly in different locations...gravity will always be constant regarding the mass thats falling!!!!!!!!!!!!!!
    Last edited: Nov 5, 2011
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