| Term | Definition |
|---|
| acceleration | the change in velocity over time |
| average speed | The average rate of movement, for example the number of feet traveled in a certain number of seconds, or the number of miles traveled in a certain length of time. |
| instantaneous speed | the speed of an object at a particular instant in time |
| balanced force | Two forces that are equal in size and opposite in direction. They have a net force of zero. Two forces exert the same amount of force on an object, causing no change in motion. Two equal forces give off the same amount of force on an object. |
| unbalanced force | When 2 forces are not equal, they work against each other. 2 forces with different strengths putting a force against each other |
| displacement | the vector that specifies the change in position of a point or a particle in reference to a previous position |
| distance | a numerical description of how far apart objects are. In physics or everyday discussion, it may refer to a physical length, a period of time, or an estimation based on other criteria (e.g. "two counties over"). |
| force | is that which can cause an object with mass to accelerate |
| inertia | the resistance of an object to a change in its state of motion |
| net force | a vector produced when two or more forces { F1, F2, ... } act upon a single object |
| speed | the rate of motion, or equivalently the rate of change in position: the distance traveled per unit of time |
| velocity | the rate of change of position |
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