/usr/share/step/examples/springs.step is in step 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
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<!DOCTYPE StepCoreXML>
<world xmlns="http://edu.kde.org/step/StepCoreXML" version="1.0" id="1">
<name>World</name>
<color>#ffffffff</color>
<time>0.01</time>
<timeScale>1</timeScale>
<errorsCalculation>false</errorsCalculation>
<item class="Particle" id="2">
<name>p1</name>
<color>#ff000000</color>
<position>(-214.992,-11.9976)</position>
<velocity>(1.50154,0.470181)</velocity>
<mass>1</mass>
</item>
<item class="Particle" id="3">
<name>p2</name>
<color>#ff000000</color>
<position>(-116,18.9946)</position>
<velocity>(-0.0868556,-1.07437)</velocity>
<mass>1</mass>
</item>
<item class="Particle" id="4">
<name>p3</name>
<color>#ff000000</color>
<position>(-19.9961,-22)</position>
<velocity>(0.789543,0.00678148)</velocity>
<mass>1</mass>
</item>
<item class="Particle" id="5">
<name>p4</name>
<color>#ff000000</color>
<position>(86.9948,-50.9915)</position>
<velocity>(-1.04924,1.70909)</velocity>
<mass>1</mass>
</item>
<item class="Particle" id="6">
<name>p5</name>
<color>#ff000000</color>
<position>(166.994,25.9944)</position>
<velocity>(-1.155,-1.11168)</velocity>
<mass>1</mass>
</item>
<item class="Spring" id="7">
<name>s1</name>
<color>#ff00ff00</color>
<restLength>88.0056816347672</restLength>
<stiffness>10</stiffness>
<damping>0</damping>
<body1>2</body1>
<body2>3</body2>
<localPosition1>(0,0)</localPosition1>
<localPosition2>(0,0)</localPosition2>
</item>
<item class="Spring" id="8">
<name>s2</name>
<color>#ff00ff00</color>
<restLength>89.0056178002265</restLength>
<stiffness>10</stiffness>
<damping>0</damping>
<body1>3</body1>
<body2>4</body2>
<localPosition1>(0,0)</localPosition1>
<localPosition2>(0,0)</localPosition2>
</item>
<item class="Spring" id="9">
<name>s3</name>
<color>#ff00ff00</color>
<restLength>88.0227243386615</restLength>
<stiffness>10</stiffness>
<damping>0</damping>
<body1>4</body1>
<body2>5</body2>
<localPosition1>(0,0)</localPosition1>
<localPosition2>(0,0)</localPosition2>
</item>
<item class="Spring" id="10">
<name>s4</name>
<color>#ff00ff00</color>
<restLength>95.005263012109</restLength>
<stiffness>10</stiffness>
<damping>0</damping>
<body1>5</body1>
<body2>6</body2>
<localPosition1>(0,0)</localPosition1>
<localPosition2>(0,0)</localPosition2>
</item>
<solver class="AdaptiveEulerSolver" id="11">
<name>Solver</name>
<stepSize>1</stepSize>
<toleranceAbs>0</toleranceAbs>
<toleranceRel>0.01</toleranceRel>
</solver>
<collisionSolver class="GJKCollisionSolver" id="12">
<name>collisionSolver1</name>
<toleranceAbs>0.001</toleranceAbs>
</collisionSolver>
<constraintSolver class="CGConstraintSolver" id="13">
<name>constraintSolver1</name>
</constraintSolver>
</world>
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