FHSST Physics/Collisions and Explosions/Summary

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

Important Equations and Quantities[edit]

Table 8.1: Units commonly used in Collisions and Explosions
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


\begin{matrix}\overrightarrow{p} = m\overrightarrow{v}\end{matrix}


Kinetic energy:

\begin{matrix}E_{k} = \frac{1}{2}m\overrightarrow{v}^{2}\end{matrix}