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Grade 4 F-2 Sci. Def
Chapter 2 Motion - Forces at Work
Term | Definition |
---|---|
position | A certain place |
motion | A change of position |
frame of reference | The things around you that you can sense and use to describe motion |
relative motion | A motion that is described based on a frame of reference |
speed | A measure of an object's change in position during a unit of time; for example |
force | A push or pull |
newton | The metric |
acceleration | A change in the speed or direction of an object's motion |
gravity | A force that pulls all objects toward each other |
weight | A measure of the force of gravity upon an object |
friction | A force that keeps objects that are touching each other from sliding past each other easily |