G-force (gravitational force) is a force acting on a body as a result of acceleration or gravity. For instance, someone standing on the ground at sea level generates 1 g. A pilot of an aerobatics ...

You may have seen soldiers sitting on a helicopter's edge and wondered how they don't fall out. While it looks like magic, ...

The g-force of getting to near-lightspeed would be monumental, unless you sped up very carefully. Humans are adapted to survive at 1 g, the gravitational force on Earth.