Air pressure and force of lift

AI Thread Summary
The discussion centers on calculating lift using Bernoulli's principle, focusing on the relationship between pressure differences and wing surface area. The formula for lift is identified as force equals area multiplied by pressure. The user seeks clarification on using a pressure difference expressed as a percentage of atmospheric pressure, specifically asking if a 4% difference translates to a pressure value of 0.04 in the formula. This highlights a common confusion in applying percentage values to physical formulas. Understanding how to convert pressure differences into usable values is crucial for accurate lift calculations.
spidey64
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I know about Bernoulli's principle and that a difference of pressure below and above a wing create lift, but I cannot find anywhere a formula or any information on how to find the amount of lift given the surface area of the wing and the difference in pressure as a percentage of atmospheric pressure...my book is not helpful at all.
 
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I've found that force = area X pressure, which of course makes sense...but given that my problem gives me the difference of pressures below and above as 4% atmospheric pressure, is the pressure value in that formula .04?
 

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