<?xml version="1.0" encoding="UTF-8" standalone="no"?><Modellus><Main AutoPlay="1" DecimalPlaces="2" Degrees="0" Independent="t" Max="500.0" Min="0.0" Password="" Protected="0" ShowCases="0" Step="0.1"/><Editor Height="517" LocationX="0" LocationY="0" Minimized="0" Width="280"><Line Text="g=100"/><Line Text="m1=100"/><Line Text="m2=10.00"/><Line Text="v1x!0=0.00"/><Line Text="v1y!0=0"/><Line Text="x1!0=0.00"/><Line Text="y1!0=0.00"/><Line Text="v2x!0=0.00"/><Line Text="v2y!0=10"/><Line Text="x2!0=100.00"/><Line Text="y2!0=0.00"/><Line Text="r12=#((x1-x2)^2+(y1-y2)^2)"/><Line Text="F12=g*(m1*m2)/r12^2"/><Line Text="F12x=-F12*(x1-x2)/r12"/><Line Text="F12y=-F12*(y1-y2)/r12"/><Line Text="F21x=-F12x"/><Line Text="F21y=-F12y"/><Line Text="a1x=F12x/m1"/><Line Text="a1y=F12y/m1"/><Line Text="$v1x=a1x"/><Line Text="$v1y=a1y"/><Line Text="$x1=v1x"/><Line Text="$y1=v1y"/><Line Text="a2x=F21x/m2"/><Line Text="a2y=F21y/m2"/><Line Text="$v2x=a2x"/><Line Text="$v2y=a2y"/><Line Text="$x2=v2x"/><Line Text="$y2=v2y"/></Editor><Animator ShowGrid="0"><Grid Spacing="1"><Color Alpha="255" Blue="192" Green="192" Red="192"/></Grid><particle AttachedTo="" Auto-Scale="0" BoundsHeight="40" BoundsWidth="40" BoundsX="-20" BoundsY="-20" Case="0" IsNameVisible="1" LeaveAMarkEvery="10" LocationX="464.0" LocationY="130.0" Name="Earth" PositionXValue="15.151308438173128" PositionYValue="14.864580887483907" SelectedImageFromLibrary="Earth" ShowAxes="1" ShowName="1" ShowProjectionLines="1" ShowStroboscopy="1" ShowTrajectory="1" ShowValue="1" XScale="1.0" YScale="1.0"><Background Alpha="255" Blue="232" Green="194" Red="83"/><Foreground Alpha="255" Blue="0" Green="0" Red="0"/><PositionX IsFixed="0" IsNumber="0" Name="x1" Situation="0" Value="15.151308438173128"/><PositionY IsFixed="0" IsNumber="0" Name="y1" Situation="0" Value="14.864580887483907"/></particle><particle AttachedTo="" Auto-Scale="0" BoundsHeight="20" BoundsWidth="20" BoundsX="-10" BoundsY="-10" Case="0" IsNameVisible="1" LeaveAMarkEvery="10" LocationX="463.0" LocationY="132.0" Name="Moon" PositionXValue="-51.51308438173145" PositionYValue="67.35419112516088" SelectedImageFromLibrary="Moon" ShowAxes="1" ShowName="1" ShowProjectionLines="1" ShowStroboscopy="1" ShowTrajectory="1" ShowValue="1" XScale="1.0" YScale="1.0"><Background Alpha="255" Blue="232" Green="194" Red="83"/><Foreground Alpha="255" Blue="0" Green="0" Red="0"/><PositionX IsFixed="0" IsNumber="0" Name="x2" Situation="0" Value="-51.51308438173145"/><PositionY IsFixed="0" IsNumber="0" Name="y2" Situation="0" Value="67.35419112516088"/></particle></Animator><Notes Height="100" LocationX="0" LocationY="320" Minimized="1" Text="{\rtf1\ansi&#10;{\fonttbl\f0\fnil Monospaced;\f1\fnil Tahoma;}&#10;{\colortbl\red0\green0\blue0;\red15\green20\blue25;}&#10;&#10;\li0\ri0\fi0\f1\fs24\i0\b0\cf1\par&#10;}&#10;" Width="100"/><Chart AutoScale="1" AxisValues="0" EqualScales="0" Height="304" LocationX="302" LocationY="0" MaximumX="26.927000000000085" MaximumY="26.927000000000085" Minimized="1" MinimumX="-0.8699999999999986" MinimumY="-0.35878363020778536" Points="0" ProjectionLines="0" TangentLines="0" Thickness="1" Values="0" Width="325"><Horizontal IsFixed="1" IsNumber="0" Name="t" Situation="0" Value="21.6"/><Terms><Vertical1 IsFixed="1" IsNumber="0" Name="x1" Situation="0" Value="15.151308438173128"/><Color1 Alpha="255" Blue="64" Green="64" Red="64"/><Vertical2 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="NaN"/><Color2 Alpha="255" Blue="64" Green="64" Red="64"/><Vertical3 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="0.0"/><Color3 Alpha="255" Blue="64" Green="64" Red="64"/><Vertical4 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="0.0"/><Color4 Alpha="255" Blue="64" Green="64" Red="64"/><Vertical5 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="0.0"/><Color5 Alpha="255" Blue="64" Green="64" Red="64"/></Terms></Chart><Table Height="100" LocationX="604" LocationY="0" Minimized="1" ShowBars="0" Steps="1" Width="100"><Terms><Variable1 IsFixed="1" IsNumber="1" Name="t" Situation="0" Value="1.5707963267948966"/><Color1 Alpha="255" Blue="64" Green="64" Red="64"/><Variable2 IsFixed="1" IsNumber="1" Name="g" Situation="0" Value="451.8849189606894"/><Color2 Alpha="255" Blue="64" Green="64" Red="64"/><Variable3 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="60.0"/><Color3 Alpha="255" Blue="64" Green="64" Red="64"/><Variable4 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="30.0"/><Color4 Alpha="255" Blue="64" Green="64" Red="64"/><Variable5 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="NaN"/><Color5 Alpha="255" Blue="64" Green="64" Red="64"/><Variable6 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="NaN"/><Color6 Alpha="255" Blue="64" Green="64" Red="64"/><Variable7 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="NaN"/><Color7 Alpha="255" Blue="64" Green="64" Red="64"/><Variable8 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="NaN"/><Color8 Alpha="255" Blue="64" Green="64" Red="64"/><Variable9 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="NaN"/><Color9 Alpha="255" Blue="64" Green="64" Red="64"/><Variable10 IsFixed="1" IsNumber="1" Name="" Situation="0" Value="NaN"/><Color10 Alpha="255" Blue="64" Green="64" Red="64"/></Terms></Table><Data><Parameters/><InitialConditions><Term EqualAllCases="0" Name="v1x"><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/></Term><Term EqualAllCases="0" Name="v1y"><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/></Term><Term EqualAllCases="0" Name="x1"><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/></Term><Term EqualAllCases="0" Name="y1"><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/></Term><Term EqualAllCases="0" Name="v2x"><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/></Term><Term EqualAllCases="0" Name="v2y"><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/><Situation Value="10.0"/></Term><Term EqualAllCases="0" Name="x2"><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/><Situation Value="100.0"/></Term><Term EqualAllCases="0" Name="y2"><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/><Situation Value="0.0"/></Term></InitialConditions></Data></Modellus>