The acceleration of free fall, also known as acceleration due to gravity, is the acceleration experienced by an object when it falls solely under the influence of Earth's gravitational force, without any air resistance. Near the Earth's surface, this acceleration is approximately 9.8 meters per second squared (9.8 m/s²). This means that the velocity of a freely falling object increases by 9.8 m/s every second during its fall. This acceleration is represented by the symbol ggg and is constant for all objects regardless of their mass when air resistance is negligible.