frame of reference - collection of objects at rest to each other, vector - measurement with magnitude and direction, scalar - measurement with only magnitude, resultant - the sum of two or more vectors, cardinal directions - north-east-south-west, origin - place from which motion is measured, position - determined by distance and direction from origin, distance - separation between two points, displacement - measurement from starting to final position, average speed - total distance divided by total time, instantaneous speed - rate the object is moving at that moment, constant speed - rate the object is moving is not changing, velocity - change in position divided by time interval, from rest - initial velocity is 0 m/s, to a stop - final velocity is 0 m/s, free fall - acceleration is 9.8 m/s2, constant velocity - acceleration is 0 m/s2, slope - rise / run, x-axis - axis represents time on all motion graphs, magnitude - the measurement and unit for a vector or scalar,

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