\( \frac{d x}{d t}=v=3 t^2-12 t+20\)
\( \frac{d v}{d t}=a=6 t-12\)
When \(\mathrm{a}=0\)
\(6 \mathrm{t}-12=0 ; \mathrm{t}=2 \mathrm{sec}\)
At \(\mathrm{t}=2 \mathrm{sec}\)
\(\mathrm{v}=3(2)^2-12(2)+20\)
\(\mathrm{v}=8 \mathrm{~m} / \mathrm{s}\)
$\begin{array}{|c|c|c|c|c|} \hline t( s ) & 0 & 1 & 2 & 3 \\ \hline x ( m ) & -2 & 0 & 6 & 16 \\ \hline \end{array} $