\documentclass[tikz]{standalone}\input{pre.tex}\begin{document}\begin{tikzpicture}[
force/.style={>=latex,draw=blue,fill=blue},
% axis/.style={densely dashed,gray,font=\small},
axis/.style={densely dashed,black!60,font=\small},
interface/.style={
pattern = north east lines,
draw = none,
pattern color=gray!60,
},
cargo/.style={
rectangle,
fill=magenta!40,
draw=black!50,
inner sep=2.5mm,
},
spring/.style={
decoration={
aspect=0.3,
segment length=.8mm,
amplitude=2mm,
coil},
decorate,
draw=magenta!70
}
]
\matrix[column sep=2cm] {
\begin{scope}[rotate=14]
\draw[force,->] (0,0) coordinate (a) --
node[midway,fill=white!20, opacity=0.9]
{$2\vec{v}_c$}
(4,0);
\draw[force,->] (0,0) --
node[midway,fill=white!20, opacity=0.9]
{$\vec{p}_1$}
(1,2) coordinate (b);
\draw[force,->] (1,2) --
node[midway,fill=white!20, opacity=0.9]
{$\vec{p}_2$}
(4,0) coordinate (c);
\draw pic["$\Theta_1$",draw=magenta,->,angle eccentricity=1.5,angle radius=0.5cm] {angle=a--b--c};
\end{scope}
&
\begin{scope}[rotate=14]
\draw[force,->] (0,0) coordinate (a) --
node[midway,fill=white!20, opacity=0.9]
{$2\vec{v}_c$}
(4,0);
\draw[force,->] (0,0) --
node[midway,fill=white!20, opacity=0.9]
{$\vec{p}_{1\text{н}}$}
(3,2) coordinate (b);
\draw[force,->] (b) --
node[midway,fill=white!20, opacity=0.9]
{$\vec{p}_{2\text{н}}$}
(4,0) coordinate (c);
\draw pic["$\Theta_2$",draw=magenta,->,angle eccentricity=1.5,angle radius=0.5cm] {angle=a--b--c};
\end{scope}
\\
};
\end{tikzpicture}\end{document}
