What occurs with the total drag when an airplane is in steady flight at the speed indicated by point A?

In steady flight at a specific airspeed, total drag is the sum of both induced drag and parasite drag. At the optimal velocity, which corresponds to point A, the aircraft reaches a point of minimum total drag. This is a critical concept in aerodynamics and performance, as it indicates the most efficient flight condition for an airplane.

When total drag is minimized, the aircraft is able to maintain steady flight with the least amount of drag force opposing its motion, thus requiring less power and fuel to sustain that flight. The interaction between induced drag, which decreases with increased airspeed, and parasite drag, which increases, leads to a specific point where the total drag is at its lowest.

This understanding is vital for pilots when planning for fuel efficiency and range. Operating at the speed corresponding to minimum total drag allows for optimal performance and fuel conservation during flight.