1. Acceleration

2. Is speed usually constant?
What happens to the speed of each object depicted below?

3. Is speed usually constant?
What happens to the speed of each object depicted below?

4. Is speed usually constant?
What happens to the speed of each object depicted below?

5. Is speed usually constant?
What happens to the speed of each object depicted below?

6. What 2 types of speed exist?
Average speed
For most moving objects, speed is not constant
Because speed can change so much, we calculate average speed
Average speed = Total distance/Total time

7. What is Velocity?
In order to describe motion completely, you need to know:
Speed
Direction of motion
Velocity = Speed in a specific direction .

8. What is Velocity? Examples Storm tracking
We need to know the speed of the storm = 25km/hr
We need to know its direction = eastward
Then we know its velocity = km/h eastward

9. What is Velocity? Examples Air traffic controlling
We need to know the speed of the plane = 900km/hr
We need to know its direction = westward
Then we know its velocity = km/h westward