I'm using this with my classes to develop intuition on when objects travel at constant velocity and when they accelerate. The combination of the graph and the animation of the object is to emphasize students using measurements (not just observations) to understand whether or not an object is traveling at constant velocity.
This will result in a formulation of Newton's 2nd law from observation. I always have trouble creating an actual hands-on model that doesn't have frictional effects, and this offers a start to getting a perfect environment that gets students working with the concept.
