\begin{definition}[Definition:Force of Gravity]
The '''force of gravity''' or '''gravitational force''' is the force on a body as a result of Newton's Law of Universal Gravitation.
When used in an unqualified sense, it is usual for this to mean the force on a body at the surface of the Earth.
From Gravity at Earth's Surface, this is approximately $9.8 \ \mathrm N \ \mathrm{kg}^{-1}$
The force of gravity varies across the earth's surface, and therefore it makes little sense to use it as a standard.
However, the {{WP|General_Conference_on_Weights_and_Measures|CGPM}} adopted a standard acceleration of gravity of $9.806 \, 65  \ \mathrm N \ \mathrm{kg}^{-1}$ in 1901.
Category:Definitions/Gravity
\end{definition}