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Kala Stevenson
Chapter 11 vocabulary
Term | Definition |
---|---|
frame of reference | A system of objects that are not moving with respect to one another. |
relative motion | Movement in relation to a frame of reference. |
distance | The length of the path between two points. |
vector | A quantity that has magnitude and directions. |
resultant vector | The vector sum of two or more vectors. |
speed | The ratio of the distance an object moves to the amount of time the object moves. |
average speed | The total distance traveled, divided by the time it takes to travel that distance. |
instantaneous speed | The rate at which an object is moving at a given moment in time. |
velocity | A description of both speed and direction of motion. |
acceleration | The rate at which velocity changes. |
free fall | The movement of an object toward Earth solely because of gravity. |
constant accerleration | A steady change in velocity. |
linear graph | In which the displayed data form straight-line parts. The slope of the line is the acceleration. |
nonlinear graph | A curve connects the data points that are plotted. |