G-force isn't a speed, it's a measure of acceleration. It's a way to describe how much stronger the force of gravity is compared to the force of gravity on Earth's surface.

Here's the breakdown:

* 1 G is equal to the acceleration due to gravity on Earth's surface, which is approximately 9.8 meters per second squared (m/s²). This means that for every second an object falls, its speed increases by 9.8 meters per second.

* 2 G means the acceleration is twice the acceleration due to gravity on Earth.

* 3 G means the acceleration is three times the acceleration due to gravity on Earth, and so on.

So, instead of asking "how fast is g force," it's better to ask:

* How many Gs are experienced in a specific situation? For example, a rollercoaster might experience 4Gs at the peak of a loop.

* How long does a specific G force last? This is important because even a small number of Gs can be dangerous if sustained for a long time.

Let me know if you'd like to know more about G-force and its effects on the human body!