Discussion:  Understanding Distance, Speed, and Time Relationships Using Simulation Software tool 
Topic:  Does step size really equal speed? 
Related Item:  http://mathforum.org/mathtools/tool/13171/ 
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Subject:  RE: Does step size really equal speed? 
Author:  KT8 
Date:  Apr 18 2007 
"step size" of 1 equals 1 step per second whereas I am seeing it as 1 foot, or 1
meter, or some other measure of length, not speed. I think most students would
interpret the word "size" to be a measure of length, not length/time.
Thanks to all who have responded and turned my "shortcomings" into "teachable
moments!"
KT8
On Apr 18 2007, Cr.Morgan wrote:
> KT8,
I�m not sure what your question is exactly. I see the
> step size as the rate of x amount of steps per second. If a runner
> takes a step size of 1 (step per second) it will take him 100
> seconds to run the 100 yards. If the runner takes a step size of 2,
> it will take him 50
seconds to run the 100 yards. The students can
> experiment changing the step size (rate) and come up with various
> conclusions using the applet.
Maybe the label should be changed
> to steps per second to make it clearer, but with experimentation,
> students can and do pick up the idea behind the step size and see
> what happens when they change this rate.
Sincerely,
Craig Morgan
> Participant in workshop 2
 
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