Which principle helps explain how lift is generated on airplane wings by describing how changes in air velocity affect pressure?

Which principle helps explain how lift is generated on airplane wings by describing how changes in air velocity affect pressure?

• A. Bernoulli's Principle
• B. Archimedes Principle
• C. Pascal's Principle
• D. Boyle's Law

Answer: (A)

Lift comes from pressure differences created by how air flows around a wing. The wing’s curved top and flatter bottom make air speed up over the top and move more slowly beneath. Bernoulli's principle says that when a fluid speeds up, its pressure drops. So the fast-moving air above the wing has lower pressure while the slower air below remains at higher pressure, pushing the wing upward and creating lift. This connection between velocity and pressure in a flowing fluid is what explains why wings generate lift as the airplane moves forward. The other principles describe different phenomena—buoyancy in a fluid, pressure transmission in fluids, and gas behavior with volume changes—which don’t directly explain the velocity–pressure link for lift around a wing.

Lift comes from pressure differences created by how air flows around a wing. The wing’s curved top and flatter bottom make air speed up over the top and move more slowly beneath. Bernoulli's principle says that when a fluid speeds up, its pressure drops. So the fast-moving air above the wing has lower pressure while the slower air below remains at higher pressure, pushing the wing upward and creating lift. This connection between velocity and pressure in a flowing fluid is what explains why wings generate lift as the airplane moves forward. The other principles describe different phenomena—buoyancy in a fluid, pressure transmission in fluids, and gas behavior with volume changes—which don’t directly explain the velocity–pressure link for lift around a wing.