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Chapter 11 Vocab.
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 a direction associated with it. |
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 the distance. |
instantaneous speed | the rate at which an object is moving at a given moment in time. |
velocity | the speed and direction an object is moving, measured relative to a reference point. |
acceleration | the rate at which velocity changes. |
free fall | the movement of an object toward Earth because of gravity. |
constant acceleration | a steady change in velocity. |
linear graph | a graph in which the displayed data forms a straight line. |
nonlinear graph | a graph in which the displayed data forms a curved line. |