11 terms

Chapter 1, 8th grade

STUDY
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reference point
the starting point you choose to describe the location, or position, of an object
position
an object's distance and direction from a reference point
motion
the process of changing position
displacement
the difference between the initial (first) position and the final position of an object
speed
a measure of the distance an object travels per unit of time
constant speed
the rate of change of position in which the same distance is traveled each second
instantaneous speed
speed at a specific instant in time
average speed
the total distance traveled divided by the total time taken to travel that distance
velocity
the speed and the direction of a moving object
acceleration
a measure of the change in velocity during a period of time
average acceleration
a change in velocity during a time interval divided by the time interval during which the velocity changes