Airspeed may be less or more than ground speed; what is the other speed measure?

Airspeed may be less or more than ground speed; what is the other speed measure?

• A. Wind speed
• B. Ground speed
• C. Altitude
• D. Vertical speed

Answer: (B)

Airspeed is how fast the airplane moves through the air, while ground speed is how fast it moves over the ground. Wind is what links the two: if the wind pushes from behind, ground speed can be higher than airspeed; if the wind blows against you, ground speed can be lower. The question is asking which is the other speed measure alongside airspeed, and that is ground speed—the speed you care about for navigation and timing over the earth. For example, with 100 knots in the air and a 20-knot tailwind, your ground speed is 120 knots; with a 20-knot headwind, it’s 80 knots. Wind speed describes how fast the air itself is moving, but the two speed measures relevant here are airspeed and ground speed.

Airspeed is how fast the airplane moves through the air, while ground speed is how fast it moves over the ground. Wind is what links the two: if the wind pushes from behind, ground speed can be higher than airspeed; if the wind blows against you, ground speed can be lower. The question is asking which is the other speed measure alongside airspeed, and that is ground speed—the speed you care about for navigation and timing over the earth.

For example, with 100 knots in the air and a 20-knot tailwind, your ground speed is 120 knots; with a 20-knot headwind, it’s 80 knots. Wind speed describes how fast the air itself is moving, but the two speed measures relevant here are airspeed and ground speed.