A few people are getting it wrong with the theories with lift, especially the ones who say air molecules has to go farther on the top. Please read on incorrect lift theory. NASA has 3 pages on wrong theories and 2 on right.
[https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/wrong1.html](https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/wrong1.html)
And for OP, to understand Bernoulli’s principle, think of a garden hose with a constant flow of water. If you cover the opening, leaving a small space for water to go, water has to go fast. It means the flow speeds up due to the reduction of static pressure or potential energy.
And if you look in one of the correct theories of lift,
[https://www.grc.nasa.gov/www/k-12/airplane/right1.html](https://www.grc.nasa.gov/www/k-12/airplane/right1.html)
You can see the page stating that Bernoulli’s principle is used for some simple flow problems to find how pressure is distributed across the wing if we know the local velocity across the wing then finding a net force helping us know if there is lift or drag.
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