1. Measuring Motion
Chapter 10.1

2. How do you know when an object is moving?
To detect motion in on object, you must observe that object in comparison to a reference point.
Movement occurs when the object you’re looking at changes position compared to the reference point.
You can describe the motion of the object by using reference directions, such as North, South, East, and West.

3. Distance measures the path taken
To accurately describe motion, you need to not only know what direction an object is moving in, but also how far it went.

4. Displacement vs. distance traveled.
Distance is the actual path taken .
Displacement measures only the distance from the starting to ending points.

5. Displacement
For example, if you were to wander around town and end up at the store, your displacement would be the distance from your starting point (your house) to your ending point (the store). Displacement is always measured in a straight line.

6. Displacement must always be in a particular direction
Displacement must always indicate direction. So if your distance from home to the store is 12 blocks, it must have a direction for which way you are heading.
That would make your final measurement 12 blocks towards the store.