Question

Which principle is used in designing the wings of airplanes?

(a) Archimedes principle

(b) Pascal’s principle

(c) Bernoulli’s Principle

(d) Newton’s second law of motion

This question was posed to me in an online interview.

This key question is from Fluid Statics and Fluid Dynamics topic in section Fluid Flow Theory & Applications of Food Processing Unit Operations

Answer 1

Right option is (c) Bernoulli’s Principle

To elaborate: Bernoulli’s Principle is used in designing the wings of airplanes. According to the law of aerodynamics called Bernoulli’s principle, fast moving air has low pressure than slow moving air which has high pressure, so therefore pressure above wings is lower compared to pressure below the wings and this creates the lift in the plane that powers it to fly upwards.