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A balloon filled with helium can carry 2 people each of a mass of 85 kg. the balloon materials and the carriage weigh 980 N. if the acceleration when the balloon is first released is 16.40 ft/s^2, calculate the volume of the balloon in m^3. The buoyancy force is defined as the weight of the fluid displaced. It is given in this situation as FB= Pair x Vballoon x g. Apply Newton's second law of motion and solve for the unknown volume after some algebra.
Use for the density of air Pair=1.16 kg/m^3 and for Phe=0.166 kg/m^3
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