Bernoulli's principle explains which fundamental relationship in aerodynamics?

Bernoulli's principle explains which fundamental relationship in aerodynamics?

• A. As fluid speed increases, pressure decreases.
• B. Speed is proportional to pressure.
• C. It describes the relationship between velocity and density.
• D. It describes the relationship between heat and lift.

Answer: (A)

Bernoulli's principle shows that in a steady, incompressible flow, faster moving air means lower static pressure. On a wing, air speeding over the top surface creates lower pressure relative to the bottom surface, producing lift. That inverse relationship between speed and pressure is the core idea: as speed increases, pressure decreases. The other statements mix up the relationships (speed being directly proportional to pressure; linking velocity to density; or tying lift to heat), which don’t describe what Bernoulli’s principle actually states.

Bernoulli's principle shows that in a steady, incompressible flow, faster moving air means lower static pressure. On a wing, air speeding over the top surface creates lower pressure relative to the bottom surface, producing lift. That inverse relationship between speed and pressure is the core idea: as speed increases, pressure decreases. The other statements mix up the relationships (speed being directly proportional to pressure; linking velocity to density; or tying lift to heat), which don’t describe what Bernoulli’s principle actually states.