The acceleration of an object near the surface of the Earth, when it's only experiencing heavy forces, is called the acceleration of gravity, or the acceleration of a free fall, and it's called g. The direction of g is always going to be straight down. At the same location, the gravitational acceleration of any object is the same. Both theoretical analysis and accurate experiments show that the value of g increases slightly with the increase of latitude, such as g=9.780 m/s 2 near the equator and g=9.832 m/s 2 in the Arctic region.