Newton & Aristotle - two ideas about motion

In this frictionless fantasy microworld, Aristotle and Newton are racing their cars around a track. Since each of them has his own idea about how velocity and force are related their cars behave differently. Can you figure our how each thinks about motion? Which theory more closely approximates how your students think about motion? How can you use this applet to help students with misconceptions about motion? Time moves in discrete steps in this microworld. From your perspective as a teacher, is that an advantage or a disadvantage?