Discussion:  Understanding Distance, Speed, and Time Relationships Using Simulation Software tool 
Topic:  From physical to abstraction 
Related Item:  http://mathforum.org/mathtools/tool/13171/ 
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Subject:  RE: From physical to abstraction 
Author:  msmathchick 
Date:  May 6 2008 
I don't think it is possible at this
> point, but I would love for my technology students to be able to
> take this model a step further. Example 1: Make the first runner's
> speed be your best mile run speed this school year. The second
> runner's speed could be set to the presidential or national physical
> fitness standard for your gender and age group.
Actually, I don't see why you couldn't do that. You could have them use a
graphing tool. If you use the equation d=rt where d=y and t=x the r would be
their speed. You just want to manipulate the window so that they only see the
first quadrant. If you want one to start high and go down so that the paths
meet you would just use a negative speed and pick a fixed point as your
yintercept. The only catch I see is challenging the students to change mph
to ft per second.
 
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