1. Connect the 1st Xplorer to the USB port of the computer. After it powers up, disconnect it and connect the 2nd Xplorer in the same manner.
2. Disconnect the second Xplorer from the computer. Steps 1 and 2 assure that the Xplorers' internal clocks are synchronized.
3. Connect the Photogate Port to one of the Xplorers and the Acceleration Sensor to the other Xplorer.
4. Place the Rotating Platform on a smooth level surface and use the adjusting knobs on the base to level the unit (see photo below).
   
   
   
5. Connect the Photogate Head to the base of the platform, such that the beam will be interrupted by the 3-step pulley (see photo below).
   
   
   
6. Plug the cable of the photogate into the Photogate Port and place the Xplorer on the table next to the platform.
7. Place the Xplorer with the Acceleration Sensor on the Rotating Platform with the sensor at a radius of 5 cm from the axis of rotation (see photo below).
   
   
   
8. The x-y axis on the front of the sensor indicates the location of the acceleration-sensing element in the case. Be sure to align this axis with 5 cm for the first data run (see photo below).
   
   
   

To download the Uniform Circular Motion DataStudio file, click on a Windows (Zip file) or Macintosh (Stuffit file).

You are now ready to begin collecting data.