The sound barrier, also known as Mach 1, is the speed at which an object moves through a medium (such as air) at the same speed as the sound waves it generates. In dry air at sea level, the speed of sound is approximately 343 meters per second (about 1,125 feet per second). This corresponds to Mach 1.
It's important to note that the sound barrier is not measured in "Gs" (or "g-forces"). G-force refers to the force experienced by an object as a result of acceleration or deceleration. It is typically measured relative to the acceleration due to gravity, which is 1 g.
When an object approaches the speed of sound, it experiences aerodynamic forces that can cause a rapid increase in drag and other effects. These forces are not typically measured in terms of g-forces. However, when an object exceeds the speed of sound, it is said to be supersonic, and the forces experienced can vary depending on the design and characteristics of the object.
In summary, the sound barrier represents the speed at which an object matches the speed of sound in a specific medium, and it is not directly related to g-forces.