Leading edge is the part of an airfoil that hits the air particles first.

• A. Trailing Edge
• B. Leading Edge
• C. Root
• D. Mid-Chord

Answer: (B)

The airfoil’s leading edge is the front edge that faces into the oncoming air and is the first point of contact for the airflow. This is where the flow splits and a stagnation point forms, setting up the pressure distribution that allows the air to move smoothly over the surface and generate lift. The trailing edge is at the rear where the flow rejoining occurs, the root is the inner junction where the wing meets the fuselage, and mid-chord is simply a point halfway along the wing’s chord, not where the air first hits. So the statement correctly identifies the leading edge as the part that encounters air first.