What are the four aerodynamic forces that act on an aircraft in flight?
AThrust, drag, lift, and weight.✓ Correct answer
BThrust, drag, power, and gravity.
CVelocity, drag, lift, and mass.
Why →The four forces are Thrust (forward force from propulsion), Drag (rearward air resistance), Lift (upward force perpendicular to relative wind), and Weight (downward gravitational force). In straight-and-level unaccelerated flight, thrust equals drag and lift equals weight.
The trap →"Power" is not a force: power produces thrust. "Velocity" and "mass" are properties, not forces.