\documentclass[convert=true,convert={convertexe={convert},density=1200,outext=.png}]{standalone}

\input{figsDefs.tex}

\begin{document}
	
\begin{tikzpicture}%
	\fill[blue!20] (-2,-1.2) rectangle (2,1.6);
	\draw[blue] (1,.7) node {fluide};
	% objet x=sin(2*pi*t),y=(t*(t-1)*exp(2*t))*cos(2*pi*t)
	\shorthandoff{:}
	\draw[thick,blue] plot[parametric,id=temp,smooth,domain=0:1,samples=30] function{sin(2*pi*t),(t*(t-1)*exp(2*t))*cos(2*pi*t)};
	\shorthandon{:}
	\path (-.2,.2) node[coordinate] (CM) {};
	\draw[blue,fill] (CM) circle (0.05) node[below left=-2pt] {\tiny CM};
	\draw[->,>=latex,thick,forceCol] (CM) -- +(0,1) node[right] {$\vec{F}_A$};
	\draw[->,>=latex,thick,forceCol] (CM) -- +(0,-1) node[right] {$m_\text{morceau}\vec{g}$};
	%\draw[blue] (0,0.3) node {fluide};
\end{tikzpicture}%

\end{document}