Final answer:
The g-force of a football hit that can lead to a concussion is typically more than 30 G due to the rapid acceleration and deceleration of the brain within the skull.
Step-by-step explanation:
The g-force of a football hit that can lead to a concussion is typically more than 30 G. A concussion occurs when the brain undergoes rapid acceleration and deceleration within the skull. This can happen during a high-speed impact or collision, such as a hard tackle in football. The force of impact can cause the brain to move and collide with the inside of the skull, resulting in a concussion.