%% 
%%  A DANTE-Edition example
%% 
%%  Example 30-02-2 on page 585.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks-add}
\def\majorette{\psline[linewidth=0.5mm](0,2)\pscircle[fillstyle=solid]{0.1}
  \pscircle[fillstyle=solid](0,2){0.1}}

\begin{document}
\psset{unit=0.8}
\begin{pspicture}(0,-6)(15,5)
\psaxes[linewidth=0.5pt]{->}(0,0)(0,-5)(15,5)
\pstVerb{/V0 10 def /Alpha 45 def}% v0 and starting angle
\multido{\nT=0.0+0.05,\iA=0+40}{41}{%
  \pstVerb{ /nT \nT\space def }
  \rput(!V0 Alpha cos mul nT mul -9.81 2 div nT dup mul mul
         V0 Alpha sin mul nT mul add){%
    \psrotate(0,1){\iA}{\majorette\psdot[linecolor=red](0,1)
                                  \psdot[linecolor=green](0,2)}
  }}% ende \multido
\parametricplot[linecolor=red]{0}{2}{% centre of grvity
  V0 Alpha cos mul t mul -9.81 2 div t dup mul mul
  V0 Alpha sin mul t mul add 1 add}
\parametricplot[linecolor=green,plotpoints=360]{0}{2}{%  s=f(x,y)
  V0 Alpha cos mul t mul 800 t mul sin sub % x(t)
  -9.81 2 div t dup mul mul
  V0 Alpha sin mul t mul add 1 add 800 t mul cos add }%y(t)
\end{pspicture}
\end{document}