Words of this topic
| Term | What it means |
| reference point | The fixed point, line or place chosen to compare an object's position or motion against. |
| relative velocity | The velocity of an object expressed by comparing it with a reference point. |
| rest | The state of not changing position with respect to the reference point. |
| motion | The state of changing position with respect to the reference point. |
| \( V_{AB} \) | The relative velocity of object A with respect to object B. |
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