Question

The volume of a balloon is 1100 m³. It is filled with helium of density 0.18 kg m-³. What maximum load can it lift? The density of air is 1.29 kg m-³.

Answer 1

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Explanation:

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Answer 2

Explanation:

Given volume of balloon V=1000m3V=1000m3

density of helium ρ=0.18kgm−3ρ=0.18kgm-3

density of air =1.29kgm−3=1.29kgm-3

Weight of helium filled balloon

=V×ρ×g=1000×0.18×g=V×ρ×g=1000×0.18×g

=180gN=180=180gN=180 kgf

Weight of air displaced = upthrust

=V×density of air×g=V×density of air×g

=1000×1.29×g=1000×1.29×g

=1290gN=1290kgf=1290gN=1290kgf

Resultant upward force on balloon

= upthrust-weight of balloon

=1290−18=110=1290-18=110 kgf

So it can life a maximum loa d of 1110 kgf.