1. Distance and Displacement In One Dimension

2. The shortest distance between any two points is a straight line
Point A
It is not always possible to make a straight line path
Point B

3. Distance
The length measured between two points along the exact path taken to get there
Ex: What is the distance between point A and Point B B A

4. Displacement B A How far two points are from each other
The length from A to B along the shortest possible path
Distance B
Displacement A

5. Magnitude and Direction
Magnitude is the amount of length, speed, etc.
Vector—a line representing the amount and direction of a measurement
Magnitude
Direction

6. Combining Displacements
Add the magnitudes of two displacement vectors that have the same direction.
Two displacement vectors with opposite directions are subtracted from each other.

7. Overall displacement can equal zero
Displacement is a change in position. If you start at a position and end at the exact same position, how much has your position changed?

8. You Try
What is the displacement of an object that moves 25 km east and then 5 km west?
Magnitude = – 5 = 20
Direction = east because the resultant arrow would point eastward 5 25