Introduction to Vectors and Scalars

xholonWorkbook.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--Xholon Workbook http://www.primordion.com/Xholon/wb/ (C) Ken Webb Sun Feb 26 2012 17:36:16 GMT-0500 (EST)-->
<XholonWorkbook>

<Notes><![CDATA[
Khan Academy
------------
Title: Introduction to Vectors and Scalars
Description: Distance, displacement, speed and velocity.  Difference between vectors and scalars
Url: http://www.khanacademy.org/video/introduction-to-vectors-and-scalars?playlist=Physics
InternalName: introduction-to-vectors-and-scalars
YoutubeId: ihNZlp7iUHE
Keywords: physics, motion, kinematics

My Notes
--------
domain objects
  Ground, Brick, I (the agent of movement)
scalar: length (in meters), distance
  vector: displacement
scalar: speed (in m/s)
  vector: velocity
  
Xholon webEdition is a HTML and JavaScript implementation of Xholon, that contains no Java. It runs in any web browser. This workbook can be run with Xholon webEdition::
  http://www.primordion.com/Xholon/wb/khan/physics/vecsca/webEdition/

]]></Notes>

<script implName="lang:python:inline:"><![CDATA[
print "TODO"
]]></script>

<script implName="lang:javascript:inline:"><![CDATA[
print("TODO\n");
]]></script>

<_-.XholonClass>

  <!-- domain objects -->
  <PhysicalSystem/>
  <Ground/>
  <Brick/>
  
  <!-- quantities -->
  <Displacement superClass="Length"/>
  <Distance superClass="Length"/>
  <Speed superClass="Velocity"/>
  
</_-.XholonClass>

<xholonClassDetails>
  <Brick>
    <port name="velocity" connector="#xpointer(Velocity)"/>
    <port name="displacement" connector="#xpointer(Displacement)"/>
  </Brick>
  <Displacement xhType="XhtypePurePassiveObject"/>
</xholonClassDetails>

<PhysicalSystem>
  <Brick>
  
    <!-- vector/scalar with the same magnitude (m) -->
    <Displacement>0.0 m</Displacement> <!-- vector with direction -->
    <Distance>0.0 m</Distance> <!-- scalar -->
    
    <!-- vector/scalar with the same magnitude m/s -->
    <Velocity>10.0 m/s</Velocity> <!-- vector with direction -->
    <Speed>0.0 m/s</Speed> <!-- scalar -->
    
  </Brick>
</PhysicalSystem>

<Blockbehavior implName="lang:python:inline:"><![CDATA[
# This works if pasted in as a last child of Brick.
# TODO
]]></Blockbehavior>

<Brickbehavior implName="lang:javascript:inline:"><![CDATA[
// This works if pasted in as a last child of Brick.
displacement.incVal(velocity.val);
print("Brick velocity=" + velocity.val + "  displacement=" + displacement.val + "\n");
]]></Brickbehavior>

<Brickbehavior implName="lang:webEditionjs:inline:"><![CDATA[
this.bindPorts(this.parent());
this.displacement.incVal(this.velocity.attr('val') - 0);
print('\nBrick velocity=' + this.velocity.attr('val') + ' ' + this.velocity.attr('unit')
  + '  displacement=' + this.displacement.attr('val') + ' ' + this.displacement.attr('unit'));
]]></Brickbehavior>

<Blockbehavior implName="lang:bsh:inline:"><![CDATA[
// This works if pasted in as a last child of Block.
//height.incVal(0.02);
//System.out.print("Java/Beanshell wants something to do. Height:" + height + "\n");
]]></Blockbehavior>

<Blockbehavior implName="lang:jruby:inline:"><![CDATA[
#require 'java'
# This works if pasted in as a last child of Block.
#$height.incVal(0.02)
#puts "Ruby wants something to do. Height: #{$height}"
]]></Blockbehavior>

<Blockbehavior implName="lang:groovy:inline:"><![CDATA[
// This works if pasted in as a last child of Block.
//height.incVal(0.02);
//System.out.print("Groovy wants something to do. Height:" + height + "\n");
]]></Blockbehavior>

<SvgClient><Attribute_String roleName="svgUri"><![CDATA[data:image/svg+xml,
<svg width="120" height="120" xmlns="http://www.w3.org/2000/svg">
 <g>
  <title>Brick</title>
  <rect y="35" x="2" width="100" height="50" fill="#B22222" id="PhysicalSystem/Brick"/>
  <g id="svg_6">
   <text xml:space="preserve" text-anchor="middle" font-family="Cursive" font-size="10" id="svg_3" y="56.5" x="51.5" stroke-width="0" stroke="#000000" fill="#000000">I'm a brick</text>
   <text xml:space="preserve" text-anchor="middle" font-family="Cursive" font-size="10" id="svg_4" y="72.5" x="52" stroke-width="0" stroke="#000000" fill="#000000">and proud of it!</text>
  </g>
 </g>
</svg>
]]></Attribute_String><Attribute_String roleName="setup">${MODELNAME_DEFAULT},${SVGURI_DEFAULT}</Attribute_String></SvgClient>

</XholonWorkbook>