Homework Help: Physics

Posted by Taylor on Thursday, March 4, 2010 at 7:12pm.

An empty rubber balloon has a mass of 0.012kg. the balloon is filled with helium at 0 degrees celcius, 1 atm pressure, and a density of 0.179 kg/m3. the filled balloon has a radius of 0.5 m.

a)what is the magnitude of the buoyant force acting on the balloon?

b)what is the magnitude of the net force acting on the balloon?

Physics - drwls, Thursday, March 4, 2010 at 8:45pm
(a) air density x volume
(If you want it in Newtons, also multiply by g)

(b)net force = balloon weight (empty) + helium weight - buoyant force
= balloon weight (empty) -(air density - helim density)*Volume

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