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"I sent CoolStuff to a new teacher I'm
mentoring. I use CoolStuff all the time and love it. The kids love it and learn from it!"
~ Dixie D. from Texas
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Lab #4.7
Mechanics: Chapter 4
Sonic Ranger
Purpose
In this activity, you will use
graphs to investigate motion.
The graphs will represent your
own motion and will be drawn by
the computer as you move.
Discussion
Graphs can be used to represent
motion. For example, if you
track the position of an object
as time goes by, you can make a
plot of position vs. time. In
this activity, the sonic ranger
will track your position and the
computer will draw a position
vs. time graph of your motion.
The sonic ranger sends out a
pulse of high frequency sound
and then listens for the echo.
By keeping track of how much
time goes by between each pulse
and corresponding echo, the
ranger determines how far you
are from it. (Bats use this
technique to navigate in the
dark.) By continually sending
pulses and listening for echoes,
the sonic ranger tracks your
position over a period of time.
This information is fed to the
computer, and the software
generates a position vs. time
graph.
Required
Equipment
Go Motion Sensor,
Computer.
Download
Student Worksheet
Teacher Notes
Return to Lab Menu
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The computer required for this lab
is a PC with Windows 98, 2000,
Me, or Xp which has a Pentium
processor or the equivalent and
a USB port. A Macintosh computer
will also work if the operating
system is Mac OS X (10.2 or
newer). Instead of a computer
this lab will also work with a Vernier LabPro, CBL
2, or TI graphing calculators.
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