Motion Diagrams
From J3 Physics
Motion Diagrams
Motion diagrams show the position of an object at equal time intervals. The object's position is usually represented by a series of dots, each of which represents the location of the object at successive, equal times.
Video Example
Here's a good example:
Why is it important that the camera not move or zoom during the recording of a motion diagram?
Link
Click here for a link to an explanation of dot diagrams at Davidson's Physlet site