Standard gravity

Standard gravity, symbolized as g₀ or g_n, is a standardized nominal value for the acceleration of an object in free fall near Earth's surface. Defined by the 3rd General Conference on Weights and Measures in 1901 as exactly 9.80665 metres per second squared, this constant represents gravitational acceleration at roughly 45 degrees latitude at sea level. It serves as a fundamental benchmark in physics, engineering calculations, and aerodynamic design.