What is the buoyant force exerted on the balloon in air

  • Thread starter Eng67
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  • #1
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Is this a correct interpretation of Archimedes Principle for this application?

A balloon is filled with helium (density = .02 kg/m^3) and has a volume of .009 m^3. What is the buoyant force exerted on the balloon in air
(density = 1.3 km/m^3)?

Fb = (1.3 km/m^3)x (.009 m^3) x (9.80 m)

= .115 N

Thanks
 

Answers and Replies

  • #2
Doc Al
Mentor
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Yes. Archimedes' Principle says that the buoyant force on an object equals the weight of the displaced fluid.
 
  • #3
SGT
Nitpick! Mass is measured in kg, not km. The latter is a measure of distance.
 
  • #4
186
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Ya.. Eng67, u'r units are all wrong
Unit for density: [tex] kg/m^3 [/tex]
Unit for gravity: [tex] m/s^2 [/tex]
 
  • #5
21
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Thanks for the help Guys. I just typed in Km instead of Kg.
 

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