the rate of change in velocity; the change in velocity over time

acceleration due to gravity
acceleration of an object as a result of gravity

average acceleration
the change in velocity divided by the time over which it changes

average speed
distance traveled divided by time during which motion occurs

average velocity
displacement divided by time over which displacement occurs

acceleration in the direction opposite to velocity; acceleration that results in a decrease in velocity

dependent variable
the variable that is being measured; usually plotted along the y-axis

the change in position of an object

the magnitude of displacement between two positions

distance traveled
the total length of the path traveled between two positions

elapsed time
the difference between the ending time and beginning time

the state of movement that results from gravitational force only

independent variable
the variable that the dependent variable is measured with respect to; usually plotted along the x-axis

instantaneous acceleration
acceleration at a specific point in time

instantaneous speed
magnitude of the instantaneous velocity

instantaneous velocity
velocity at a specific instant, or the average velocity over an infinitesimal time interval

the study of motion without considering its causes

simplified description that contains only those elements necessary to describe the physics of a physical situation

the location of an object at a particular time

a quantity that is described by magnitude, but not direction

the difference in y-value (the rise) divided by the difference in x-value (the run) of two points on a straight line

change, or the interval over which change occurs

a quantity that is described by both magnitude and direction

the y-value when x= 0, or when the graph crosses the y-axis