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# Chapter 11 Vocab

### Tremayne Stone

TermDefinition
Frame of reference A frame of objects that are not moving with respect to one another
Relative Motion A movement in relation to the frame of reference
Distance The length of a path between two points.
vector a quantity that has mass or direction
resultant vector the vector sum of two or more vectors.
speed the ratio of the distance an object moves to the amount of time an object moves.
average speed computed duration for an entire trip. I.E. total distance traveled. Formula: total distance over total time, or v=d over t
Instantaneous speed speed measured at a particular moment,rate at which an object moves at any given point.
Velocity velocity is a description of both speed and direction of motion. Velocity is a vector.
Acceleration the rate at which velocity changes. Acceleration is a vector.
Free Fall the movement of an object toward earth solely because of gravity.
Constant Acceleration A steady change in velocity.
Linear Graph The displayed data forms a straight line.
Nonlinear Graph a curve connects the plotted data.