Блог Федора Сарафанова

Исходники иллюстрации

pre.tex

\documentclass[tikz]{standalone}\input{pre.tex}\begin{document}\begin{tikzpicture}
\matrix[column sep=2cm] {

    \draw[interface] (-0.5,1) rectangle (-0.1,1.5) (0.1,1.5) rectangle (0.5,1);

    \draw[interface] (-0.5,-1) rectangle (-0.1,-1.5) (0.1,-1.5) rectangle (0.5,-1);

    \draw[axis,magenta] (0,-1.5) -- (0,1.5);
    \draw[magenta,->] 
        (0,1.75) -- ++(0,0.5) 
        node[above] {$\vec\omega$};
    \draw[magenta,->]   (0.5,1.75) -- ++ (0,0.5)
        node[above] {$\vec{N}$} 
        ;

    \draw[fill=magenta, magenta] (-1,-0.15) rectangle (1,0.15);

    \fill[magenta] (0,-1.25) coordinate (1) circle (2pt) node[below, yshift=-0.5em] {$O$};

    \fill[magenta] (0,1.25) coordinate (2) circle (2pt);

    \draw[->, thick, blue] (1) -- node[caption] {$\vec{l}$} (2);
    \draw[->, thick, blue] (2) -- node[caption] {$\vec{F}$} ++(-2,0);  

    \draw (1,1.25) node {$\bigodot$} node[right, xshift=0.5em] {$\vec{M}$};
    &
    \begin{scope}
    \draw[magenta,->]   (0,0) coordinate (o) -- ++ (0,1.5) coordinate (i)
        node[above, black] {$\vec{N}(t)$};

    \draw[magenta,->]   (0,0) -- ++ (-2.25,1.5) coordinate (ii)
        node[above, black] {$\vec{N}(t+dt)$};       

    \draw[magenta,->] (i) --node[caption] {$d\vec{N}$} (ii);    

    \draw[magenta,->] (i)++(0,1) --node[caption] {$\vec{M}$} ++(-2,0);  

    \draw pic["$d\phi$",draw=magenta,->,angle eccentricity=1.5,angle radius=0.5cm] {angle=i--o--ii};        

    \draw (-1,-1) node {$d\vec{N}=\vec{N}d\phi$};
    \end{scope}    
    \\
};
    
        

\end{tikzpicture}\end{document}