1. Speed vs. Velocity

2. Agenda 9/8
Go over quiz and labs
Go over buggy lab
Speed vs. Velocity

3. Post Buggy Lab
Describe the motion of the buggy using speed, distance and time.
What is the slope of the graph? What are the units of the slope of the graph?
What is the equation of the line of your graph?
Describe what the slope of the line on the graph means.

4. What does the slope of the following graphs tell us about the car’s motion?
Distance (m)
Time (s)
Distance vs. Time
Time (s)
Displacement (m)
Displacement vs. Time

5. Speed and Velocity Distance (m) Time (s) Distance vs. Time Time (s)
Displacement (m)
Displacement vs. Time

6. Speed vs. Velocity Speed Velocity Describes how fast an object moves
Distance traveled in a certain time
m/s
Velocity
Describes how fast an object moves in a particular direction
Displacement traveled in a certain time
m/s and DIRECTION

7. Speed vs. Velocity (What’s the difference?)
Constant velocity means constant speed with no change in direction

8. Graphing Constant Motion
Constant Velocity: when an object travels the same amount of distance in the same amount of time.
Position
Time
Position
Time

9. Constant Speed
If something is moving at a constant speed, it means we expect a constant increase in distance over time.
Time is increasing to the right, and distance is increasing steadily with time. It moves at a constant speed.

10. Constant Speed If something is not moving, a ________ line is created.
This type of line has a slope of _________, which indicates a speed of ________.

11. Bell ringer (9/9) What do you like/Dislike about each table?1 2 3 4

12. Refresher
Describe the motion of each graph.

13. Constant Speed
Both the lines show that each object moved the same distance, but the steeper line got there before the other one.
A _________________________ indicates a ___________ speed.

14. Constant Speed
When an object’s _________________ increases, the slope of the line increases.
Is this object accelerating? Or is speed changing instantaneously?

15. Constant Speed
What is occurring in this graph?

16. Worksheet on interpreting graphs

17. How Fast & which Direction How Far & which Direction How Fast
Bell Ringer (9/12)
Match the following words to their definition:
Speed
Displacement
Distance
Velocity
How Far
How Fast & which Direction
How Far & which Direction
How Fast

18. Go over Homework

19. Displacement vs. Time Graphs
Position
Initial Position
Final Position
Direction of Travel
Total Distance Traveled
Displacement
Velocity
Displacement
Time

20. Graphing Constant Motion
Constant Velocity: when an object travels the same amount of distance in the same amount of time.
Displacement
Time
Displacement
Time

21. Velocity vs. Time Graphs
t (s)
V (m/s)
(+)
(-)
Velocity vs. Time Graphs
Velocity
Tells velocity at each time interval
Tells Direction of travel
Away from origin (+)
Towards origin (-)
What does a (+) slope mean?
What does a (-) slope mean?

22. Displacement
Time
Displacement
Time
Time
Velocity
Time
Velocity

23. Velocity vs Time Graphs
t (s)
d (m)
V (m/s)
(+)
(-)
t (s)
d (m)
V (m/s)
(+)
(-)