Исходники иллюстрации

\documentclass[tikz]{standalone}\input{pre.tex}\begin{document}\begin{tikzpicture}[
    force/.style={>=latex,draw=blue,fill=blue, very thick},
    axis/.style={densely dashed,black!60,font=\small},
    interface/.style={draw=gray!60,
        postaction={draw=gray!60,decorate,decoration={border,angle=-135,
                    amplitude=0.3cm,segment length=2mm}}},
]
    \def\w{40mm}
    \def\h{90mm}
    \draw[interface] (-10mm,0) -- (\w+10mm,0);

    \draw  (0,\h) -- (0,0) -- (\w,0) -- (\w,\h);

    \foreach \c in {0,10,...,70}{
        \draw (10 mm, 80 mm - \c mm) node[left, xshift=-10mm] {\c};
        \draw (0.3,80 mm - \c mm) -- (0.7,80 mm - \c mm);
    }

    \foreach \d in {10,11,...,80}{
        \draw (0.4,\d mm) -- (0.6,\d mm);
    }

    \draw [axis, ->] (\w+10mm,\h-10mm) --(\w+10mm,10mm) node [below] {$+x$};

    \coordinate (C) at (\w/2, 60mm);
    \draw [fill=black!30] (C) circle (2.5mm);

    \draw[force, ->] (C) -- ++ (0, 10mm) node [right] {$\vec{F}_\text{арх}$};
    \draw[force, ->] (C) -- ++ (0, 20mm) node [right] {$\vec{F}_\text{тр}$};

    \draw[force, ->] (C) -- ++ (0,  -20mm) node [right] {$m\vec{g}$};

    \draw [fill=black] (C) circle (0.5mm);

    \draw [<->] (0,5mm) --(\w,5mm) node [above, pos=0.5] {$2R$};

    \draw[axis] ($(C)+(0,2.5mm)$) --($(C)+(10mm,2.5mm)$);
    \draw[axis] ($(C)+(0,-2.5mm)$) --($(C)+(10mm,-2.5mm)$);

    \draw[<->] ($(C)+(10mm,2.5mm)$)--($(C)+(10mm,-2.5mm)$) node [right, pos=0.5] {$2r$};

    \draw [fill=black, opacity=0.1] (0,0) -- (0,\h-8mm) -- (\w,\h-8mm) -- (\w,0) -- cycle;


\end{tikzpicture}\end{document}