Motion refers to an object changing its position over time. Distance is how far an object has moved, while displacement includes both distance and direction of motion. Speed is the distance traveled over a period of time. Velocity differs from speed in that it considers both distance and direction of motion. While an object's speed may remain constant, its velocity changes if its direction of motion changes.

1. Position and Motion

11. Constant Speed Graph

13. What would a changing speed graph look like?