[edit] Important Equations and Quantities

**Table 9.1:** Units used in Newtonian Gravitation
Units
Quantity	Symbol	Unit	SI base units	Direction
mass	m	--	kg or --	--
velocity	$\overrightarrow{v}$	--	$\frac{\mbox{m}}{\mbox{s}}$ or $\ \ \mbox{m} \cdot \mbox{s}^{-1}$	yes
force	$\overrightarrow{F}$	N	$\frac{\mbox{kg} \cdot \mbox{m}}{\mbox{s}^2}$ or $\ \ \mbox{kg} \cdot \mbox{m} \cdot \mbox{s}^{-2}$	yes
energy	E	J	$\frac{\mbox{kg} \cdot \mbox{m}^2}{\mbox{s}^2}$ or $\ \ \mbox{kg} \cdot \mbox{m}^{2} \cdot \mbox{s}^{-2}$	--