ch. 18 motion and momentum
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Created by:
treygillis on October 21, 2011
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9 terms
Terms | Definitions |
|---|---|
 speed | distance an object travels in a unit of time |
| average speed | total distance traveled divided by total time taken |
| instantanious speed | speed of an object at an instant time |
| velocity | speed and direction of motion |
| acceleration | change in velocity divided by the time it takes for the change to occur |
| mass | amount of matter in an object |
| inertia | tendency of an object to resist a change in its motion |
| momentum | measure of how hard it is to stop an object |
| law of conservation of momentum | total momentum of a group of objects remains constant unless outside forces act on the group |
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