How do I find the accelerating ascension rate of my helium balloon?(adsbygoogle = window.adsbygoogle || []).push({});

Ignore factors such as the increase of volume as it ascends, temperature, wind etc.

I just want the basic ascension rate of ideal non changing conditions.

rho_f Outside air density - I think typical air density is this - 1.2 kg/m^3

v Volume - 179.59438 m^3

m Mass - 90.7184 kg

g Earth's gravity - 9.80665 m/s^2

Through some research I have been given this formula but am not sure if its the correct one or how to compute it.

a = g*(rho_f * V - m)/(rho_f*V + m)

And also this link

http://en.wikipedia.org/wiki/Buoyancy#Beyond_Archimedes_Principle

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# Ascension rate of balloon

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