Forces on a constrained party balloon

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SUMMARY

The discussion centers on estimating the forces acting between a party balloon and a straw when the balloon is inflated against a rigid wall. The user suggests calculating the force by first determining the PSI (pounds per square inch) of the inflated balloon and then finding the area of the bonded contact surface in square inches. By dividing the PSI by the area, one can derive the force in pounds at the point of gluing. This method provides a straightforward approach to quantifying the forces involved in this constrained balloon scenario.

PREREQUISITES
  • Understanding of PSI (pounds per square inch) measurement
  • Knowledge of basic physics principles related to pressure and force
  • Ability to calculate area in square inches
  • Familiarity with the concept of bonded contact surfaces
NEXT STEPS
  • Research the relationship between pressure and force in fluid mechanics
  • Learn about the properties of elastic materials and their behavior under pressure
  • Explore methods for measuring PSI in inflatable objects
  • Investigate the effects of constraints on the deformation of balloons
USEFUL FOR

This discussion is beneficial for physics students, engineers, and hobbyists interested in fluid dynamics and material properties, particularly in applications involving inflatable objects and pressure calculations.

BuddyJim
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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.
 

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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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