1. Position vs time graphs
Of an object at rest
Objective: Determine when and where an object stopped at on a p-t graph

2. If an object is staying in the same position for a time interval then it is…
at rest.
stopped.
not moving.
still.
has a speed or velocity of 0 m/s, 0 m.p.h.
What does this look like?

3. Describe what the object is doing at 1 second, 2 seconds, 3 seconds, etc.?
5 m
4 m
At 1 seconds the object is located 4 meters from the origin
position
3 m
2 m
1 m
0 m
4 s
2 s
3 s
5 s
0 s
1 s
time

4. Describe what the object is doing at 1 second, 2 seconds, 3 seconds etc.?
5 m
4 m
At 2 seconds the object is located 4 meters from the origin
position
3 m
2 m
1 m
0 m
4 s
2 s
3 s
5 s
0 s
1 s
time

5. Describe what the object is doing at 1 second, 2 seconds, 3 seconds etc.?
5 m
From 0 to 5 seconds the object is located 4 meters from the origin
4 m
position
3 m
2 m
1 m
0 m
4 s
2 s
3 s
5 s
0 s
1 s
time

6. On a position vs. time graph, an object at rest is represented by a horizontal line.

7. Number your whiteboards from 1 to 5 and answer the question about the graphs
Quiz yourself

8. 1) When and where is the object at rest?
10m
8 m
position
6 m
4 m
2 m
0 m
4 s
2 s
3 s
5 s
0 s
1 s
time

9. 2) When and where is the object not moving?
position
3 m
2 m
1 m
0 m
8 s
4 s
6 s
10 s
0 s
2 s
time

10. 3) When and where is the object still?
+3 m
+2 m
position
+1 m 0m
-1 m
-2 m
20 s
10 s
15 s
25 s
0 s
5 s
time

11. 4) When and where does the object experience a speed = 0m/s
position
+5 m 0m
-5 m
-10 m
4 s
2 s
3 s
5 s
0 s
1 s
time

12. 5) When did the object stop the closest to the reference point?
+6 m
+4 m
position
+2 m 0m
-2 m
-4 m
40 s
20 s
30 s
50 s
0 s
10 s
time

13. *
Answers

14. 1) When and where is the object at rest?
10 m
From 2 to 4 seconds the object is located 6 meters from the origin
8 m
position
6 m
4 m
2 m
0 m
4 s
2 s
3 s
5 s
0 s
1 s
time

15. 2) When and where is the object not moving?
From 0 to 4 seconds the object is not moving at 4 meters away
5 m
4 m
From 8 to 10 seconds the object is not moving at 3 meters away
position
3 m
2 m
1 m
0 m
8 s
4 s
6 s
10 s
0 s
2 s
time

16. 3) When and where is the object still?
+3 m
From 15 to 25 seconds the object is located -1 meters from the origin
+2 m
position
+1 m 0m
-1 m
-2 m
20 s
10 s
15 s
25 s
0 s
5 s
time

17. 4) When and where does the object experience a speed = 0m/s
From 1 to 3 seconds, at the10 m mark
position
+5 m 0m
-5 m
-10 m
4 s
2 s
3 s
5 s
0 s
1 s
time

18. 5) When did the object stop the closest to the reference point?
+6 m
From 40 to 50 seconds, it is at rest 2 meters behind the reference point
+4 m
position
+2 m 0m
-2 m
-4 m
40 s
20 s
30 s
50 s
0 s
10 s
time

19. *
How did you do?

20. What would a position- vs- time graph look like of your desk as measured from the chalkboard -for the entire class period?
How would your graph be similar, different from your classmates?