use Motion Sensors to measure the motion of two carts in a variety of collisions.
use the Xplorer GLX to record and display the velocity for each cart.
use the graphs of velocity versus time and the built-in analysis tools of the Xplorer GLX to determine the velocity before and after for each cart in each collision.
calculate the total momentum before and the total momentum after each collision.
compare the momentum before and the momentum after for each collision.
