| A | B |
|---|
| Reference Point | The starting point you use to describe the motion or the position of an object. |
| Motion | The process of changing position. |
| Speed | The distance an object moves divided by the time it takes to move that distance (Distance/Time=Speed D/T=Sp). |
| Velocity | The speed and the direction of a moving object. |
| Acceleration | A measure of the change in velocity during a period of time. |
| Distance-Time Graph | A graph that shows how distance and time are related. It actually graphs speed (d/t=sp). |
| Speed-Time Graph | A graph that shows the speed of an object on the y-axis and time on the x-axis. It actually graphs acceleration (change in velocity/change in time = acceleration). |
| balanced forces | Equal forces acting on an object in opposite directions; this causes the object to stand still or move at a constant speed and direction |
| unbalanced forces | Forces that produce a nonzero net force, which changes an object's motion, speed, or brings it to a stop |
| Force | A push or pull exerted on an object |
| constant speed | Speed that does not change |
| net force | The sum of all forces acting on an object |
| Speed Unit | m/s |
| Velocity Unit | m/s NW |
| Acceleration Unit | m/s/s |
| Acceleration unit condensed | m/s2 (speed is squared) |
| average speed | The overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time. |
| Deceleration | A decrease in speed or negative acceleration |
