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Forces on a constrained party balloon

  1. Apr 26, 2012 #1
    Hi, A party balloon is glued onto an straw. The user inflates the balloon by blowing through the straw. However, the balloon is constrained due the presence of a rigid wall just beyond it (causing the balloon to expand upwards or backwards towards the person inflating it!). I would like to know if it is possible to estimate the forces between the balloon and the straw (at the point of gluing).

    Strange question, I know.
     

    Attached Files:

  2. jcsd
  3. Apr 26, 2012 #2
    I'd start by knowing the PSI. then I would find the area of the bonded contact surface in square inches.

    Then I would divide PSI by square inches to get pounds. That number in pounds would be the force.

    Just a guess.
     
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