Question

The aircraft fly based on which principle _________

(a) Newton’s third law

(b) Conservation of mass

(c) Bernoulli’s principle

(d) Gravity

I had been asked this question in quiz.

The above asked question is from Bernoulli’s Equation in chapter Inviscid & Incompressible Flow of Aerodynamics

Answer 1

Correct answer is (c) Bernoulli’s principle

The explanation: An aircraft fly based on Bernoulli’s principle. As the air speed increases, the pressure decreases which results in high lift generation. According to this principle, the pressure is inversely proportional to velocity.