The gain in speed each second for a freely falling object is about 9.8 meters per second (m/s). This is also known as the acceleration due to gravity, often represented by the symbol g.

Keep in mind:

* This value is an approximation and can vary slightly depending on location and altitude.

* This means that for every second an object falls, its speed increases by 9.8 m/s.

* This is a constant acceleration, meaning the object's speed increases at a steady rate.