Second Semester Review Packet
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Created by:
12mrichter on June 1, 2009
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Description:
physics study guide
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50 terms
Terms | Definitions |
|---|---|
 Scientific Method | an orderly method for gaining organizing and appling new knowledge |
| Fact | close agument by coment observers who make a series of observation of the same phenomenon |
| Hypothesis | an educated guess |
| Law/Principle | when hypothesis about the relationships among natural quantities and tested over and over again |
| Therory | a synthisis of a large body of info that compasses WELL TESTED AND VARIFID HYPOTHESIS |
| Independent Variable | the variable that you change on purpose |
| dependent variable | variable that remains constant |
| qualitative obsevations | obsevations on color of shape |
| quantitative obsevations | obsevations with numbers |
| force | push or pull |
| net force | the combination of all forces acting on an object |
| vector | an arrow that represents the magnitude and direction |
| Vector quantity | the quantity that need both magnitude and direction |
| scalor quantity | the quantity that can be described ny magnitude only, NO DIRECTION |
| mechanical equilibrium | the state where there is no physical change |
| support force | the upward force that ballences the object |
| reaultant | the sum of two or more vectors |
| friction | force that acts beetween materials that touch as they move past each other |
| inertia | the property of a body to resist change to it's state of motion |
| Newton's first law | law of inertia |
| Law of Inertia | an object in motion tends to stay in motion and an obect at rest tends to stay at rest unless acted on by an outside force |
| Kilogram | the SI unit of mass |
| mass | amount of matter in an object |
| wieght | the force of gravity on a object |
| Newton | Unit of force |
| Relative | one objectin respect for the other |
| Speed | how fast an object is moving |
| Instantaneous speed | The speed at any instant |
| Average Speed | total distance coverd divided by the time it took |
| velocity | speed in any given direction |
| Acceleration | the rate at which velocity is changing |
| Free fall | an object moving under the inflence of gravity only |
| Elapsed time | the time that has past |
| Horizontal Component | a force moving paralle to the ground |
| vertical component | vertical motion (free fall) |
| Resultant | the sum of two or more vectors |
| projectille | any object that moves through the air acted in only be gravity |
| Inversly proportional | two values changing in opopisite directions |
| newtons second law | f=ma |
| Fluid | Gas or Liquid |
| Air Resistance | friction action on something moving through the air |
| free body diagram | a diagram showing all the forces acting on an object |
| pressure | the amount of force per unit of area |
| pascal | what pressure is measured in |
| terminal speed | the speed at which the acceleration of a falling object |
| terminal velocity | terminal speed together with the direction the direction of motion |
| Interaction | a action between one thing and another |
| newton's third law | every action has an ewual and opisite reaction |
| action force | one forece equal and oppisite to the reaction force |
| reaction force | the other force equal and oppisite to the action |
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