How do Bernoulli's principle and Newton's third law explain how an airplane can fly?

Answer 1

Newton's third law states that every action has an equal and opposite reaction. In planes, this is embodied by the combustion of fuel in a jet engine. As it exits the engine under pressure it has momentum - the oppsite action is the plane moving forward. Bernoulli's principle involves the idea that faster moving air has a lower pressure and that the converse is true. The shape of wings and propellors creates a faster flow over one surface compared to the other; this creates a pressure differential and pushes/pulls the the wing/propellor in the desired direction (forward or up).

Answer 2

Bernoulli's principle states that an increase in the speed of a fluid (in this case, air) results in a decrease in pressure. This principle explains how the shape of the airplane's wings creates a pressure difference that generates lift. Newton's third law explains that for every action, there is an equal and opposite reaction. As the airplane's engines push air backward, the plane moves forward in the opposite direction, generating thrust. Combined, these principles explain how an airplane can fly by creating lift and thrust.