Assertion: gravity | /r/HasProperty | 9.81 meters per second squared
Facets:
value: on the surface of earth
type: LOCATION
Source sentences:
text: Gravity (or the acceleration due to gravity) is 9.81 meters per second squared, on the surface of Earth, because of the size of Earth and the distance we are on its surface from its center.
text: It is the acceleration due to gravity that changes and that is what we are talking about when we say gravity is 9.81 meters per second squared.