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Topic: NCTM Applet to better understand Distance, Time Graph
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Subject:   NCTM Applet to better understand Distance, Time Graph
Author: timatthebeach
Date: May 26 2007
I find this Applet a very useful tool to help children better understand
distance/time with a graph. I like the ability to have the runners move
alongside one another at various speeds and using the one-step key to see how
the graph is formed. It allows the operator to change the speed and the starting
position of the runners. When the runners are running the same speed, the child
will see the graphs form parallel lines. By having the runners run toward each
other, the graphs intersect. A question might be: Do the runners collide? If
they start at the same time, the answer is yes. This brings up the difference
between time as we read on a clock and time elapsed, as measured by a stopwatch.
Low friction carts can be rolled toward each other and the time elapsed can be
measured. Kids love stopwatches! Here's a web site with similar Applets, used by
college kids taking science:
http://webphysics.davidson.edu/physlet_reources/physlet_physics/contents/start.html.
Those who get bored can try some of these. Tim Marvin

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