diff --git a/tex/DescribingMotionIn1D.tex b/tex/DescribingMotionIn1D.tex index 2be3e2c..0507adc 100644 --- a/tex/DescribingMotionIn1D.tex +++ b/tex/DescribingMotionIn1D.tex @@ -542,7 +542,7 @@ \subsection{Solutions} \end{align*} We want the left hand side to be $2a(x-x_0)$, so we multiply each term by $2a$: \begin{align*} -2a(x-x_0)x&=(2a)v_0\left( \frac{v-v_0}{a}\right) +(2a)\frac{1}{2}a\left( \frac{v-v_0}{a}\right) ^2\\ +2a(x-x_0)&=(2a)v_0\left( \frac{v-v_0}{a}\right) +(2a)\frac{1}{2}a\left( \frac{v-v_0}{a}\right) ^2\\ 2a(x-x_0)&=(2v_0)a\left(\frac{v-v_0}{a}\right)+a^2\left( \frac{v-v_0}{a}\right) ^2\\ 2a(x-x_0)&=2v_0(v-v_0)+(v-v_0)^2 \end{align*} @@ -558,7 +558,7 @@ \subsection{Solutions} 2a(x-x_0)&=v^2-v_0^2\\ \therefore v^2-v_0^2&=2a(x-x_0)\\ \end{align*} -If you choose a coordinate system such that $x_0$, this equation becomes $v^2-v_0^2=2ax$. +If you choose a coordinate system such that $x_0=0$, this equation becomes $v^2-v_0^2=2ax$. \end{solution} \newpage @@ -631,7 +631,7 @@ \subsection{Solutions} \begin{itemize} \item Between $t=\SI{0}{s}$ and $t=\SI{3}{s}$, position decreases quadratically, as the velocity is negative and decreasing. \item Between $t=\SI{3}{s}$ and $t=\SI{6}{s}$, position decreases linearly, since the velocity is negative and constant. -\item Between $t=\SI{6}{s}$ and $t=\SI{9}{s}$, the position continues to decrease, but at a lesser rate ans the velocity approaches zero. When the velocity is zero, the position stop changing, and starts to increase quadratically as the velocity becomes positive and increasing. +\item Between $t=\SI{6}{s}$ and $t=\SI{9}{s}$, the position continues to decrease, but at a lesser rate as the velocity approaches zero. When the velocity is zero, the position stop changing, and starts to increase quadratically as the velocity becomes positive and increasing. \item Between $t=\SI{9}{s}$ and $t=\SI{12}{s}$, the position continues to increase, but at a lesser rate as the velocity decreases back to zero. \end{itemize} \end{solution}