You are familiar with one-dimensional kinematics. now you will use your prior knowledge to analyze a situation involving two-dimensional motion. the video shows a "free-falling disk" in slow motion, with a superimposed grid and a frame counter that would allow you to make distance and time measurements right off the screen, without using any additional measuring equipment. by using the experimental data, you will discover the patterns in the motion of the disk and will be able to describe that motion quantitatively.