A simultaneous change in both speed and direction. Occurs during most aerial maneuvers.

A simultaneous change in both speed and direction. Occurs during most aerial maneuvers.

• A. Linear Acceleration
• B. Radial Acceleration
• C. Angular Acceleration
• D. Negative G Force

Answer: (C)

In flying, acceleration has two practical aspects: a change in speed along the path (tangential) and a change in direction of motion (centripetal/ radial). When an aircraft goes through most maneuvers, both its speed and its flight path are changing, so the rate at which its turn is occurring can also change over time. That changing rate of turn is angular acceleration—the rate at which the angular velocity around the turn axis increases or decreases. Because most maneuvers involve the flight path bending (change in direction) and often a speed change as the maneuver progresses, angular acceleration best captures how quickly the aircraft’s turning rate itself is changing. Linear acceleration describes any change in velocity but doesn’t emphasize the rotational aspect of turning. Radial (centripetal) acceleration accounts for the inward pull that changes direction but not the time-based change in turn rate. Negative G force is a feel of the load, not the kinematic description.

In flying, acceleration has two practical aspects: a change in speed along the path (tangential) and a change in direction of motion (centripetal/ radial). When an aircraft goes through most maneuvers, both its speed and its flight path are changing, so the rate at which its turn is occurring can also change over time. That changing rate of turn is angular acceleration—the rate at which the angular velocity around the turn axis increases or decreases. Because most maneuvers involve the flight path bending (change in direction) and often a speed change as the maneuver progresses, angular acceleration best captures how quickly the aircraft’s turning rate itself is changing.

Linear acceleration describes any change in velocity but doesn’t emphasize the rotational aspect of turning. Radial (centripetal) acceleration accounts for the inward pull that changes direction but not the time-based change in turn rate. Negative G force is a feel of the load, not the kinematic description.