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Kala Stevenson

Chapter 11 vocabulary

TermDefinition
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.
Created by: kala.stevenson
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