For the Ball Drop 2 experiment, observe the graph of the vertical displacement of the small ball against time (y vs. t). What can you say about the vertical displacement of the small ball? What graph shape is this? What does this shape tell you about the mathematical relationship between y and t? Now check your hypothesis by investigating two Tracker videos: Ball Drop and Large Ball Drop.

Open the Tracker experiment: Ball Drop . Watch the movie by clicking on the green play button. (The other video controls allow you to “rewind” the video or step forward or backward one frame at a time.). Watch the video to go ahead with the activity.

Now, keep the Ball Drop video open, and also open the Tracker experiment Large Ball Drop and watch that video.