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Environ. Sci. Ch 3
Environmental Science Chapter 3 Glencoe/McGraw-Hill
| Term | Definition |
|---|---|
| momentum | a property an object has because of its mass and velocity |
| Newton's 1st Law | law saying an object at rest will remain at rest unless acted upon by an outside force |
| m/s/s | unit of acceleration |
| net force | a force that always changes the velocity of an object |
| balanced forces | type of forces that are equal in size, but opposite in direction |
| force | a push or pull on an object |
| Newton | unit of force |
| mass | the amount of matter in something |
| inertia | the tendency of an object to resist motion |
| time interval | the amount of time that has passed |
| acceleration | the rate of change of velocity |
| velocity | the speed and direction of an object |
| positive acceleration | term for an object speeding up |
| negative acceleration | term for object an object slowing down |
| reference point | shows that an object is moving |
| friction | the force that opposes motion |
| Newton's 3rd Law | the law stating that for every force there is an equal and opposite force |
| motion | change in positon |
| instantaneous speed | the rate of motion at any given instant |
| Newton's 2nd Law | law stating that motion times acceleration equals force F=ma |
| constant speed | a speed that does not vary (change) |