\subsection*{Constant acceleration}
+ \begin{itemize}
+ \item \textbf{Position} - relative to origin
+ \item \textbf{Displacement} - relative to starting point
+ \end{itemize}
+
+ \subsubsection*{Velocity-time graphs}
+
+ \begin{itemize}
+ \item Displacement: \textit{signed} area between graph and \(t\) axis
+ \item Distance travelled: \textit{total} area between graph and \(t\) axis
+ \end{itemize}
+
+ \[ \text{acceleration} = \frac{d^2x}{dt^2} = \frac{dv}{dt} = v\frac{dv}{dx} = \frac{d}{dx}\left(\frac{1}{2}v^2\right) \]
+
\begin{center}
\renewcommand{\arraystretch}{1}
- \begin{tabular}{ l r } % TODO need to fix centering here
+ \begin{tabular}{ l r }
\hline & no \\ \hline
\(v=u+at\) & \(x\) \\
\(v^2 = u^2+2as\) & \(t\) \\
&= \sqrt{v_x^2 + v_y^2 + v_z^2}
\end{align*}
- \textbf{Distance travelled between \(t=a \rightarrow t=b\):}
+ \noindent \textbf{Distance travelled between \(t=a \rightarrow t=b\):}
\[= \int^b_a \sqrt{\left(\frac{dx}{dt}\right)^2 + \left(\frac{dy}{dt}\right)^2} \cdot dt \]
-
+
+ \noindent \textbf{Shortest distance between \(\boldsymbol{r}(t_0)\) and \(\boldsymbol{r}(t_1)\):}
+ \[ = |\boldsymbol{r}(t_1) - \boldsymbol{r}(t_2)| \]
+
\subsection*{Vector functions}
\[ \boldsymbol{r}(t) = x \boldsymbol{i} + y \boldsymbol{j} + z \boldsymbol{k} \]