關於g-force問題

[g-force] normally expresses the magnitude of an acceleration in terms of the acceleration due to gravity at sea level over the equator, where the value of 9.81 m/s2 presides.

Thus an acceleration of, say [3g], indictaes an acceleration of 3x9.81 m/s2, or 29.43 m/s2.

Thus if an individual has a weight of 70 kg, the force acting on his body under an acceleration of 3g is, by Newtons Law, equal to 2,060 N (i.e. three times his body-weight).

Roller coasters are generally designed not to exceed 3g.

When humans are subjected to a sustained g-force of 10g, this can be deadly or lead to permanent injury, but acceleration above 10g for short period of time (e.g. during car crash in traffic accidents) can sometimes be tolerated. Acceleration beyond 100g, even within a very short period of time, is bound to be fatal.

You may refer to the following web-page for more information:

http://www.wisegeek.com/what-is-g-force.htm