Buoyant force of air negligible?

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SUMMARY

The discussion centers on the buoyant force of air and its general neglect in calculations. Participants emphasize that the buoyant force is negligible for most objects, particularly when the object's weight is significantly greater than the buoyant force exerted by air. A practical approach suggested is to calculate the buoyant force using the equation F_b = ρ_air * V * g and compare it to the object's weight to determine its relevance in specific scenarios.

PREREQUISITES
  • Understanding of buoyancy principles
  • Familiarity with the equation for buoyant force: F_b = ρ_air * V * g
  • Basic knowledge of weight and density concepts
  • Ability to perform comparative analysis of forces
NEXT STEPS
  • Calculate buoyant force for various objects in air using F_b = ρ_air * V * g
  • Explore the effects of object shape and volume on buoyancy
  • Investigate scenarios where buoyant force becomes significant
  • Learn about buoyancy in different fluids beyond air
USEFUL FOR

Students in physics, engineers working with fluid dynamics, and anyone interested in understanding the principles of buoyancy in various environments.

jayadds
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Buoyant force of air negligible??

Why are we justified in assuming that the buoyant force on an object in air is generally negligible. Can you please explain using some example equations?

Many thanks.
 
Last edited:
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Depends on the weight of the object and how accurate you need to be. Why not calculate the buoyant force on something and compare it to that something's weight.
 

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