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ATS-Science 8
Matter vocabulary
Term | Definition |
---|---|
motion | An object's changes in position relative to a reference point. |
speed | The distance traveled by an object divided by the time interval that it took that object to travel that distance. |
velocity | The speed of an object in a particular direction. |
acceleration | The rate at which velocity changes over time; an object accelerates if its speed, direction, or both. |
force | A push or a pull exerted on an object in order to change the motion of the object; force has size and direction. |
newton | The SI unit for force (symbol, N) |
net force | The combination of all of the forces acting on an object. |
friction | A force that opposes motion between two surfaces that are in contact |
gravity | A force of attraction between objects that is due to their masses. |