A g-force is a measure of acceleration. 1G is the acceleration we feel due to the force of gravity. It's what keeps our feet firmly planted on the ground. Gravity is measured in metres per second squared, or m/s2.
People Also Ask
A G-force of 1g is equal to the conventional value of gravitational acceleration on Earth which amounts to 9.8 m/s2 (meter per second squared). In other words, it is the force a person (driver, in our case) can experience when they're accelerating or braking.
While commercial flights exert only very minimal positive and negative G-forces on passengers, several orders of magnitude greater are the G-forces experienced by astronauts, fighter pilots and stunt pilots. These types of pilots can experience brief periods of extreme forces of nine and 10 Gs.
We experience higher or lower g forces when we are rapidly changing speeds or directions. Normal humans can withstand no more than 9 g's, and even that for only a few seconds.