Collisions and Explosions
The Free High School Science Texts: A Textbook for High School Students Studying Physics
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Tiny, Violent Collisions - Types of Collisions - Explosions - Energy and Heat - Important Equations and Quantities

Important Equations and Quantities

**Table 8.1:** Units commonly used in Collisions and Explosions
Units
Quantity	Symbol	Unit	SI base units	Direction
velocity	${\overrightarrow {v}}$	--	${\frac {\mbox{m}}{\mbox{s}}}$ or $\ \ {\mbox{m}}\cdot {\mbox{s}}^{-1}$	yes
momentum	${\overrightarrow {p}}$	--	${\frac {{\mbox{kg}}\cdot {\mbox{m}}}{\mbox{s}}}$ or $\ \ {\mbox{kg}}\cdot {\mbox{m}}\cdot {\mbox{s}}^{-1}$	yes
energy	E	J	${\frac {{\mbox{kg}}\cdot {\mbox{m}}^{2}}{{\mbox{s}}^{2}}}$ or $\ \ {\mbox{kg}}\cdot {\mbox{m}}^{2}\cdot {\mbox{s}}^{-2}$	no