1. 1-D Motion Displacement, Position, and Distance Velocity vs. Speed
Frame of Reference

2. Frame of Reference
x=975 ft.
x=0
x=1000 ft.
Where is the grizzly?

3. Position vs. Displacement
Reference point
or origin
x=975 ft.
x=0
x=1000 ft.
positions
Position depends upon your
frame of reference.

4. Position vs. Displacement
Reference point
or origin
x=475 ft.
x=975 ft.
x=0
x=1000 ft.
x=500 ft.
positions
If we change our frame of reference,
Then our positions change.

5. Position vs. Displacement
x=975 ft.
25 ft.
x=0
x=1000 ft.
Displacement is the difference in
positions.

6. Position vs. Displacement
Reference point
or origin
x=975 ft.
x=475 ft.
25 ft.
x=0
x=1000 ft.
x=500 ft.
If we change our frame of reference,
the displacement stays the same.

7. 1-D Motion

8. Displacement Displacement is change in position.
Displacement can be positive or negative.

9. Velocity
Average velocity is displacement in a given time.

10. Finding displacement from velocity and time.
The high-speed train travels from Paris to Lyons at an average velocity of +227 km/h. The trip takes 2.00 h. How far is Lyons from Paris?

11. Finding displacement from velocity and time.
Paris
227 km/h
Lyons
Dt=2h
Unknown Dx

12. Finding displacement from velocity and time.
Paris
227 km/h
Lyons
Dt=2h
Unknown Dx