What is the term for the force being applied from the feet towards the head?

The term for the force being applied from the feet towards the head is referred to as negative G force. This occurs when a person experiences an acceleration that moves in the opposite direction to what is considered the standard gravitational force, which is typically felt as pushing down from the head to the feet.

When negative G forces are at play, particularly in scenarios like rapid deceleration or certain maneuvers in flight, individuals can feel a sensation of being pushed upward or a pressure that moves from their feet towards their head. This can lead to physiological effects such as increased blood flow to the head and face, which might result in visual disturbances or even loss of consciousness if the forces are extreme.

Understanding G forces is crucial in aerospace physiology as they impact pilot performance and human tolerance to acceleration forces during various flight operations.