1. Intro to Kinematics -Position -Distance -Displacement
Mrs. Coyle

2. Motion How would you describe the motion of an object?
Motion is relative.
Position is compared to an origin.
Coordinate system or a reference frame.

3. Linear Motion: Motion in One Dimension

4. Motion Diagram How can you visualize the motion of an object?
t=1.5 sec
t=1.0 sec
t=0.5 sec
t=0 sec

5. Particle Model .
t=1.0s
t=1.5s
t=0
t=0.5s

6. Position Vector
Y axis o
x=2m
x=1m
Position, (m)

7. Position Vectors
Y axis o
x=2m
x=1m
Position, (m)

8. Position Vectors o
d1=1m
d2=2m
Position, (m)

9. Vectors and Scalars Scalars  Magnitude (size)
Vectors  Magnitude and Direction

10. Distance and Displacement
Intro to Kinematics Motion in One Dimension Mrs. Coyle
Distance and Displacement
Distance: (Scalar)
Displacement: (Vector)

11. Displacement (Dd)- change in position
Displacement (Dd)- change in position. (Note: Dx can also be used as a symbol). Dd o
d1=1.5m
d2=2m
Position, d (m)

12. Example 1: A train after traveling on a straight line north for 1hour,
is located 20km from the train station.
After 1 additional hour of traveling in the same direction the train is 40km from the train station.
Draw a particle model.
Draw the position vectors for the two positions.
Draw the displacement vectors from t=1h to t=2h.
What is the total distance traveled?

13. Example 2:
A jogger jogging south for 5min is 1km from the start. She then jogs 0.5 km north for 5min.
1) Draw a particle model.
2) Draw the position vectors.
3) Draw the displacement vectors from t=5min to t=10min.
4) What is the total distance traveled?

14. Example of Position vs Time Graph
Position, (m)
20.0
10.0 A o
0.5
1.0
1.5
2.0
Time, (s)
At what time did the object return to the origin?
What is the distance travelled and displacement at point A?