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Motion
Unit 6
| Question | Answer |
|---|---|
| position | the location of an object in relation to a nearby object or place |
| motion | a change in position of an object |
| velocity | the measure of an object's change in position during a certain amount of time |
| speed | the measure of an object's change in position during a certain amount of time |
| acceleration | any change in the speed or direction of an object's motion |
| force | a push or pull, which may cause a change in an object's motion |
| friction | a force that acts between two touching objects and that opposed motion |
| unbalanced forces | forces that cause a change in an object's motion because they don't cancel each other out |
| gravity | the force of attraction between objects, such a the attraction between Earth and objects on it |
| balanced force | forces that cancel each other out because they are equal in size and direction |