What is the term for the force experienced when a body is pulled forward out of its seat during acceleration?

The term that best describes the force experienced when a body is pulled forward out of its seat during acceleration is inertial force. This phenomenon occurs due to Newton's first law of motion, which states that an object in motion will remain in motion unless acted upon by an external force. When a vehicle accelerates, the body inside it tends to remain in its original state of rest or motion, resulting in the sensation of being pushed backwards into the seat while the rest of the environment moves forward.

The primary focus of this question addresses how the force of inertia is experienced during acceleration, which is often described as a pull forward as the surrounding environment accelerates away from the body. Therefore, the correct identification of inertial force captures the nature of the experience during such an acceleration scenario effectively.

In contrast, the terms associated with G-forces like positive Gx refer to forces acting in the direction of acceleration, while negative Gx pertains to deceleration or pulling in the opposing direction. Neutral Gx signifies a lack of any significant accelerating force acting on the body. Understanding these terms helps in distinguishing between various types of forces experienced during different maneuvers in aeromedical contexts.