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    <name>mundo1</name>
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    <errorsCalculation>false</errorsCalculation>

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        <name>disco1</name>
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        <body2>3</body2>
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        <localPosition2>(0,0)</localPosition2>
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    <item class="Tracer" id="5">
        <name>trazador1</name>
        <color>#ff0000ff</color>
        <body>3</body>
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        <points></points>
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    <item class="Note" id="6">
        <name>nota1</name>
        <color>#ff000000</color>
        <position>(-0.69,3.11)</position>
        <size>(224,82)</size>
        <text>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot;&gt;&lt;/meta&gt;&lt;style type=&quot;text/css&quot;&gt;
p, li { white-space: pre-wrap; }
&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;&quot;&gt;&lt;p align=&quot;center&quot; style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:14pt; font-weight:600;&quot;&gt;Tutorial 3&lt;/span&gt;&lt;/p&gt;&lt;p align=&quot;center&quot; style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:12pt;&quot;&gt;Cuerpos rígidos y trazadores&lt;/span&gt;&lt;/p&gt;&lt;p style=&quot;-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</text>

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    <item class="Note" id="7">
        <name>nota2</name>
        <color>#ff000000</color>
        <position>(-2.91,1.65)</position>
        <size>(272,164)</size>
        <text>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot;&gt;&lt;/meta&gt;&lt;style type=&quot;text/css&quot;&gt;
p, li { white-space: pre-wrap; }
&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;&quot;&gt;&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Ángulo y velocidad angular&lt;/span&gt;&lt;/p&gt;&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;- Al seleccionar un cuerpo rígido podrá ver tres asas grises sobre él. Úselas para cambiar la velocidad, el ángulo y la velocidad angular del cuerpo.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</text>

    </item>

    <item class="Note" id="8">
        <name>nota3</name>
        <color>#ff000000</color>
        <position>(-2.88,-0.43)</position>
        <size>(266,208)</size>
        <text>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot;&gt;&lt;/meta&gt;&lt;style type=&quot;text/css&quot;&gt;
p, li { white-space: pre-wrap; }
&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;&quot;&gt;&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Trazador&lt;/span&gt;&lt;/p&gt;&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;- Un trazador es una herramienta para mostrar la trayectoria de un determinado punto de un cuerpo rígido. Ponga en marcha la simulación para verlo en acción.&lt;/p&gt;&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;- Modifique varias propiedades, como la rigidez de un muelle, y observe cómo afectan a la trayectoria.&lt;/p&gt;&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;- Añada uno o más trazadores a la caja y compare las trayectorias de distintos puntos.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</text>

    </item>

    <solver class="AdaptiveEulerSolver" id="9">
        <name>resolución1</name>
        <stepSize>1</stepSize>
        <toleranceAbs>0.001</toleranceAbs>
        <toleranceRel>0.001</toleranceRel>
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        <name>resoluciónDeColisión1</name>
        <toleranceAbs>0.001</toleranceAbs>
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        <name>resoluciónDeRestricción1</name>
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