What is the science of the action of air on an object, and the motion of air on other gases?

• A. Aerodynamics
• B. Hydrodynamics
• C. Thermodynamics
• D. Meteorology

Answer: (A)

Aerodynamics explains how air interacts with objects and how air moves around gases. It covers how airflow around wings and bodies creates lift, drag, and pitching moments, and how factors like shape, speed, and angle of attack influence those forces. It also includes ideas like the boundary layer, flow separation, and compressibility, which determine how smoothly air flows and how much force is produced. Hydrodynamics deals with fluids such as water; thermodynamics is about energy, heat transfer, and work relationships; meteorology studies weather systems and atmospheric phenomena. This makes aerodynamics the correct description for this concept.