1. Conceptual Physics by Hewitt C H A P T E R 2- Linear Motion

2. Rate
Rate is a term that refers to how fast something happens or changes.
Rate is a quantity divided by time.
Examples:
5 lunches served per minute
2 inches of rain per hour
60 miles per hour
“per” means divided by
So 60 miles per hour = 60 miles/hour or “travel 60 miles in an hour”

3. Speed Speed is a measure of how fast something is moving.
Speed is a rate and has units of distance divided by time.
Speed is a scalar quantity meaning there is no direction of movement indicated.

4. Instantaneous Speed The speed at any instant
Speedometer gives instantaneous speed

5. Average Speed Average speed = distance covered time interval
If your odometer tells you that you travelled 100 miles to Grandma’s house and it took you 2 hours, what would be your average speed? me your answer.

6. Velocity Velocity is speed in a given direction.
Velocity is a vector quantity.
Examples:
30 miles per hour eastward
20 meters per second downward

7. Instantaneous Velocity
Instantaneous velocity is the velocity at any instant.

8. Average Velocity with a direction with a direction
If Grandma lives 120 miles south of you and it takes you 3 hours to get there, what is your average velocity? .