What force is applied to the body from the front or back?

The correct response identifies the force that acts on the body from either the front or the back as transverse G force. This type of G force is directed along the body’s lateral axis and is associated with changes in speed and direction. When an aircraft accelerates or decelerates forward or backward, the body experiences this transverse G force.

Understanding G forces is crucial in aerospace physiology, as they can affect a pilot's performance and safety during maneuvers. This particular force might contribute to sensations such as being pushed forward in the seat during acceleration or backward during deceleration, which are experiences common in aviation scenarios.

Other forces mentioned, such as linear G force, would typically describe vertical acceleration (upward or downward), while radial G force relates specifically to the forces experienced during circular motion. Negative G force, on the other hand, refers to the sensation of being pushed upward (typically experienced in maneuvers that create an inversion or dive), and thus would not apply in straightforward forward or backward movements.