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 $\ \ {\mbox{kg}}\cdot {\mbox{m}}^{2}\cdot {\mbox{s}}^{-2}$	--

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