Chapter 2 Vocabulary

1. model A simplified version of a motion diagram in which the moving object is replaced by a series of single points.
3. The vector sum of two or more vectors.
6. position The position of an object at a specific instant in time.
10. velocity The total displacement divided by the total time taken.
13. velocity The velocity of an object at a specific instant in time.
15. speed The total distance traveled divided by the total time taken.
16. The measure of how much ground an object has covered during its motion.
17. diagram A series of images showing the posi tions of a moving object taken at regular (equal) time intervals.

2. system A system for locating points in space or on a plane using one or more numbers.
4. interval The duration between two specific points in time.
5. graph A graph showing the position of an object as a function of time.
7. A quantity that only has magnitude, not direction (e.g., speed).
8. A quantity characterized by both magnitude and direction, often represented by an arrow.
9. The size or quantity of a physical quantity, such as distance, velocity, or force.
11. The location of an object in a coordinate system.
12. The change in position of an object in a particular direction.
14. The point (0,0) in a coordinate system; the starting point for measuring position.