| A | B |
|---|
| Motion | A change in an object’s position relative to a reference point |
| Reference point | An object that appears to stay in place |
| Distance | The length of a path between two points |
| Displacement | The length of a straight line between the starting and ending points |
| Average speed | Distance / time |
| Instantaneous speed | The speed at a specific moment in time |
| Velocity | The speed of an object and the direction of its motion |
| Momentum | Mass x velocity |
| Acceleration | The rate at which velocity changes |
| Centripetal acceleration | Acceleration towards the center of a curved path |
| Projectile motion | The curved path an object follows when thrown or propelled near the surface of the earth |
