A. Newton’s Third Law of Motion
B. Archimedes’ Principle
C. Bernoulli’s Principle
D. Conservation of Energy
Submitted by: Zeeshan Ahmed Abbasi
Bernoulli’s principle explains how airplanes fly by creating lift, an upward force that keeps the plane in the air:
Explanation
As air flows over an airplane wing’s curved upper surface, it speeds up and its pressure decreases. This creates a region of lower pressure above the wing and higher pressure below it. The difference in pressure generates lift, which allows the plane to fly.
History:
Swiss mathematician Daniel Bernoulli identified this principle in his 1738 treatise, Hydrodynamica.
Applications:
Bernoulli’s principle is also used in the design of race cars, the study of ocean currents, and the development of medical devices.
Other forces that act on an airplane include:
Thrust: The forward force
Drag: The rearward force
Weight: The downward force
The correct answer to the question: "Which physical principle explains why airplanes can fly?" is "Bernoulli’s Principle".
