The angle of attack directly controls:

The angle of attack directly controls:

• A. It has no effect on pressure distribution
• B. The distribution of pressures acting on the wing
• C. It only affects drag
• D. It only affects engine thrust

Answer: (B)

The angle at which the wing meets the oncoming air sets how the flow adheres to and separates from the wing, which in turn shapes the pressure field around the wing. As you tilt the wing more steeply (increase the angle of attack), the flow accelerates more over the upper surface and the pressure there drops further, while the lower surface stays relatively higher in pressure. This creates a larger pressure difference between the top and bottom surfaces, which is what produces lift. The whole pattern of low pressure on the top and higher pressure on the bottom is the pressure distribution the wing experiences, and it is what the wing’s lift is directly tied to. If you push the angle of attack even further, the flow can start to separate, dramatically altering this pressure distribution and reducing lift, leading to a stall. The other options don’t fit because the angle of attack is not about removing pressure changes, and drag is not the only effect—it also controls lift through the pressure distribution. It also isn’t about engine thrust; thrust is a propulsion issue, while angle of attack governs the aerodynamic forces on the wing via pressure distribution.

The angle at which the wing meets the oncoming air sets how the flow adheres to and separates from the wing, which in turn shapes the pressure field around the wing. As you tilt the wing more steeply (increase the angle of attack), the flow accelerates more over the upper surface and the pressure there drops further, while the lower surface stays relatively higher in pressure. This creates a larger pressure difference between the top and bottom surfaces, which is what produces lift. The whole pattern of low pressure on the top and higher pressure on the bottom is the pressure distribution the wing experiences, and it is what the wing’s lift is directly tied to. If you push the angle of attack even further, the flow can start to separate, dramatically altering this pressure distribution and reducing lift, leading to a stall.

The other options don’t fit because the angle of attack is not about removing pressure changes, and drag is not the only effect—it also controls lift through the pressure distribution. It also isn’t about engine thrust; thrust is a propulsion issue, while angle of attack governs the aerodynamic forces on the wing via pressure distribution.