1. Mr. Lambert Integrated Science 1A Trimester 1, 2014
Distance-time graphs
Mr. Lambert
Integrated Science 1A
Trimester 1, 2014

2. Bell Ringer
An athlete runs 200 meters in 50 seconds. What is her average speed?
Mr. Lambert decides to drive to Chicago, which is 300 miles away. It takes him 6 hours to get there. What is his average speed?

3. Agenda Bell Ringer Learning Targets Class graph Lab activity
Practice problems
Exit Slip

4. Learning Targets
On your Bell Ringer Sheet, write the following: We will interpret distance-time graphs

5. Distance-time graphs
Distance (m)
Time (s) 10
1.89 20
2.88 30
3.78 40
4.64 50
5.47 60
6.29 70
7.10 80
7.92 90
8.75
100
9.58
Usain Bolt – world record

6. Distance-time graphs What is the independent variable? Time x-axis
What is the dependent variable?
Distance
Y-axis

7. Distance-time graphs

8. Table 1. Measuring Constant Velocity
Distance-time graphs
Table 1. Measuring Constant Velocity
 Distance (m)
 Time of Walker (s)
First
Second
Third  0  5
4.55
2.78
1.46 10
9.07
5.49
3.19
 15 15
8.62
4.58
 20
18.4
11.57
6.1
 25
23.94
15.06
7.87

9. Class distance-time graph

10. How does slope relate to speed?
Slope (speed) = Rise (Distance) Run (Time)

11. What is this graph telling us?

12. Age

13. Student performance

14. Time increases to the right, but the distance does not change – object is at rest (not moving)

15. What does this tell us?

16. Age

17. Student Grades

18. Distance
Same increase in distance in a given time – object moves at a constant speed

19. Dotted line – larger distance in given time (higher speed)
Both lines are straight – constant speed

21. Age

22. Student grades

23. Downward sloping line – object returning to start
Distance
Downward sloping line – object returning to start

24. Simulation – the moving man

25. Distance-time graphs

26. Distance-time graphs

27. Draw the following scenario
A man walks forward at a constant speed. Suddenly a dog starts to chase him and he begins to run. The man manages to outrun the dog and stops to take a break and catch his breath. The man then slowly walks back to his starting point.

28. Which of the graphs shows that one of runners started 10 yards further ahead of the other? Explain your answer.

29. In which of the following graphs above are both runners moving at the same speed? Explain your answer.

30. Exit Slip
Describe the motion of the object from point A-B, B-C, and C-D. B C D A