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

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?

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

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

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

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

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

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

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

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

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

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

* Answers

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

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

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

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

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

* How did you do?

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?