Car0 will always be on the left and Car1 will always be on the right. COE stands for Percent of Energy Conserved in the collision. All calculations will be done by the model. The ' symbol stands for values after the collision. For example, v1 is the velocity of Car1 before the collision and v1' is the velocity of Car1 after the collision. Experiment with the sliders below in order to become familiar with the modeling environment. Click on setup and go to run the model.