How Does it Work?

It is important, when performing a lab that you have an understanding about how some of the more complicated equipment works.  In this assignment you will write a one page (double spaced) paper with diagrams explaining the basic mechanics of the electronic motion sensor.  Do not concern yourself with the electronics of the sensor, our even the sensor itself, just basics, how does it work?

Ohhh.... by the way please the vocabulary of position, velocity, and acceleration in the explanation