For example, a kite. I just don’t understand how the higher pressure at the top pushes the plane forward and how it stays in the air and stuff. If anyone could explain this to me would be great!
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What you’re describing is the Bernoulli Principle, which is often taught as “how planes fly”
It isn’t.
Or at least, it isn’t the whole picture.
What’s actually happening is that the air is hitting the wing at an angle, that angle is then used to deflect that air downward. Newton’s third law states that any action has an equal and opposite reaction, so push enough air down hard and fast enough and you can push a decent mass of airplane *up* albeit slower than the air.
Propellers and jets use (at a very basic level) the same idea to produce thrust. Sucking air in and deflecting it backwards pushes you forward.
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