Tyngdeacceleration
Tyngdeacceleration, or gravitational acceleration, is the acceleration a body experiences due to gravity in the vicinity of a massive body such as Earth. It is commonly denoted by g and measured in meters per second squared (m/s^2). Near the Earth's surface, g is about 9.81 m/s^2 in a vacuum, but it varies with location and altitude.
g is defined as the acceleration of a freely falling object, ignoring air resistance. In vector form
In practice, g varies with altitude, latitude, and local mass distribution. At higher elevations, g decreases
g is related to weight by W = m g, where m is mass. It is the acceleration