Original: Acceleration due to gravity varies over the surface of the Earth , generally increasing from about 9.78 m\/s2 ( 32.1 ft\/s2 ) at the equator to about 9.83 m\/s2 ( 32.3 ft\/s2 ) at the poles .
Simplified: The value adopted in the International Service of Weights and Measures for the standard acceleration due to Earths gravity is 980.665 cm\/s2 , value already stated in the laws of some countries .