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Chapter 9
Chapter
| Term | Definition |
|---|---|
| motion | the state in which one object's distance from another is changing |
| reference point | A place or object used for comparison to discribe the position or motion of a person or object |
| distance | the leght of a path between two points |
| displacement | the lrngth and direction of a straight line between starting and ending points |
| vector | a measurable quantity that consists of both a magnitude and a direction |
| speed | the distance an object travels in certain period of time without regard to direction |
| 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 |
| instantaneous speed | the speed of an object at any given instant |
| velocity | speed in a given direction |
| slope | the steepness of a line on a graph |
| acceleration | the rate at which velocity with time |
| work | aword that describes what is done an object when a force is exerted on an object that causes it to move |
| energy | the ability to do work or cause change |
| kinetic enrgy | energy that an object has due to its motion |
| potential energy | stored energy that results from position or shap of an object |
| gravitational potential energy | potential energy related to an object's height |
| elastic potenial energy | the energy of stretched or compressed objects |
| mechanical energy | an object's combined kinetic energy and potential energy |
| law of conseration of energy | the rule that energy canont be created or destroyed |