Ground speed is defined as the speed of an aircraft measured relative to the ground, taking wind into account.

Ground speed is defined as the speed of an aircraft measured relative to the ground, taking wind into account.

• A. HEADWIND
• B. GROUND SPEED
• C. FUSELAGE
• D. HANGAR

Answer: (B)

Ground speed is how fast the airplane is moving over the Earth’s surface, with wind taken into account. It comes from combining the aircraft’s true airspeed with the wind component along the flight path. If the wind is from behind (a tailwind), ground speed increases; if the wind is from ahead (a headwind), ground speed decreases. The other terms are not measures of speed over the ground—headwind is a wind direction relative to the aircraft, while fuselage and hangar refer to parts of the aircraft or its storage, not the speed over the ground.

Ground speed is how fast the airplane is moving over the Earth’s surface, with wind taken into account. It comes from combining the aircraft’s true airspeed with the wind component along the flight path. If the wind is from behind (a tailwind), ground speed increases; if the wind is from ahead (a headwind), ground speed decreases. The other terms are not measures of speed over the ground—headwind is a wind direction relative to the aircraft, while fuselage and hangar refer to parts of the aircraft or its storage, not the speed over the ground.