| A | B |
|---|
| frame of reference | a system of objects that are not moving with respect to one another |
| relative motion | movement in relation to a frame of reference |
| distance | length of a path between two points |
| resultant vector | the vector sum of two or more vectors |
| speed | ratio of the distance an object moves to the amount of time the object moves |
| average speed | the total distance traveled divided by the time it takes to travel that distance |
| instantaneous speed | the rate at which an object is moving at a given moment in time |
| velocity | the speed and direction in which an object is moving |
| acceleration | rate of change in velocity |
| free fall | movement of an object toward the Earth solely from gravity |
| constant acceleration | a steady change in velocity |
| nonlinear graph | a curve connects the data points on a graph |
| linear graph | the data displayed is in a straight line |
| vector | a quantitiy that has magnitude and direction |
