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# Ch16 - Motion

### Physics

motion The state in which one object's distance from another is changing.
reference point A place or object used for comparison to determine if an object is in motions.
International System of Units A system of measurement based on multiples of ten and on established measures of mass, length, and time.
meter The basic SI unit of length.
speed The distance an object travels per unit of time.
average speed The overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time.
instantaneous speed The speed of an object at one instant of time.
velocity Speed in a given direction.
slope The steepness of a line on a graph, equal to its vertical change divided by its horizontal change.
acceleration The rate at which veloctiy changes.
spped = distance/time
slope = rise/run
Created by: nicholas_tisci

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