A | B |
 | An object sits, at rest, 10 meters from the origin. |
 | An object sits, at rest, five meters behind the origin. |
 | An object is moving with contstant positive velocity. |
 | An object is moving towards the origin with negative constant velocity. |
 | An object starts ahead of the origin and moves with positive constant velocity. |
 | An object starts behind the origin and moves with positive constant vleocity. |
 | An object starts behind the origin and moves with negative constant velocity. |
 | An object moves past the origin with neagive constnat velocity. |