Chapter 6- Newton's Laws of Motion
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13 terms
Terms | Definitions |
|---|---|
 displacement | distance and direction between starting and ending positions |
| speed | distance traveled divided by the time needed to travel the distance |
| velocity | displacement divided by the time |
| acceleration | the change in velocity divided by the amount of time required for the change to occur |
| force | a push or a pull |
| first law of motion | An object will remain at rest or move in a straight line with a constant speed unless it is acted upon by a force |
| balanced forces | equal forces in opposite directions, they will cancel each other out |
| unbalanced forces | forces acting on an object that do not cancel out |
| second law of motion | An objecct acted on by an unbalanced force will accelerate in the direction of the force |
| friction | a force that resists motion between surfaces thatt are touching |
| third law of motion | Forces always act in equal but opposite pairs |
| inertia | the tendency of an object to resist any change in its motion |
| air resistance | force that opposes the motion of objects that move through the air |
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