Two carts of unequal mass are sent into a collision.  The velocities of each cart both before and after are found so that the total momentum before and after the collision can be determined and compared. This is Lab 3 Tier 1 Set-Up “A” of four set-ups. Each setup has a different initial velocity for each cart.  The carts are sent either toward each other or away from each other depending on the setup. Download file includes the Video (MP4), an editable Lab Sheet (MS Word) for student use, and the Teacher’s Guide (PDF) for the instructor.