Calculating Buoyant Force of Balloon System

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SUMMARY

The discussion centers on calculating the buoyant force of a hot air balloon system experiencing an acceleration of 110 m/s² downward. The total mass of the balloon is 315 kg, leading to a gravitational force of 3087 N. The net force is calculated as 34650 N, resulting in an upward buoyant force of 31563 N. The calculations raise concerns about the feasibility of such an acceleration, suggesting a review of the problem statement is necessary.

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Homework Statement



A hot air balloon experiences an acceleration of 110 m/s2 [down]. The total mass of the balloon is 315kg
What is the buoyant force of the system?

aballoon = 110m/s2
agravity = 9.8m/s2
mtotal = 315

Homework Equations


Fgravity = 315 * 9.8 = 3087
Fnet = 315 * 110 = 34650

The Attempt at a Solution


-Fup + Fgravity = Fnet
-Fup + 3087 = 34650
-Fup = 34650 - 3087
-Fup = 31563

Which is not the answer 274 N up
 
Last edited:
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Seriously? A hot air balloon accelerating at a rate of 110 m/s^2? That's about 11 g's. The air force is going to want to know about this! Maybe NASA!

Better check the numbers given in the problem statement.
 

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