Sections

Key Terms
# Key Terms

- acceleration
- the rate at which velocity changes

- average speed
- distance traveled divided by time during which motion occurs

- average velocity
- displacement divided by time over which displacement occurs

- dependent variable
- the variable that changes as the independent variable changes

- displacement
- the change in position of an object against a fixed axis

- distance
- the length of the path actually traveled between an initial and a final position

- independent variable
- the variable, usually along the horizontal axis of a graph, that does not change based on human or experimental action; in physics this is usually time

- instantaneous speed
- speed at a specific instant in time

- instantaneous velocity
- velocity at a specific instant in time

- kinematics
- the study of motion without considering its causes

- magnitude
- size or amount

- position
- the location of an object at any particular time

- reference frame
- a coordinate system from which the positions of objects are described

- scalar
- a quantity that has magnitude but no direction

- speed
- rate at which an object changes its location

- tangent
- a line that touches another at exactly one point

- vector
- a quantity that has both magnitude and direction

- velocity
- the speed and direction of an object