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# Motion

TermDefinition
Acceleration the rate at which velocity changes; increasing speed, decreasing speed, or changing direction; (final speed minus initial speed) divided by time = acceleration
Average Speed the overall rate of speed at which an object moves at a non-constant rate; total distance divided by total time = average speed
Distance how much ground is covered by a moving object from start to finish
Meter the basic SI unit for length; equal to about 1.1 yards
Motion the state in which one object's distance from another object is changing
Reference Point a place or object used for comparison to determine if an object is in motion
Slope the steepness of a line on a graph, equal to its vertical change divided by its horizontal change; slope = rise divided by run
Speed the distance an object travels per unit of time; speed = distance divided by time
Velocity speed in a given direction; distance divided by time along with a stated direction
SI units system System International; measurement system used by scientists worldwide to help guarantee clear communication; commonly known as the metric system
Created by: Rita.Rogers