1. Motion in One Dimension Frame of reference, distance and displacement

2. One-dimensional motion is the simplest form motion One way to simplify the concept of motion is to consider only the kinds of motion that take place in one direction. An example would be the motion of a commuter train on a straight track. On a straight track, the train can only move forward or backward. (Physics Serway/Faughn pg 36 - Holt)

3. Frame of Reference Physicists usually choose a frame of reference against which changes in position can be measured. The frame of reference selected remains fixed for the problem in question and has an origin or starting point from which motion is measured.

4. If an object is at rest (not moving), its position does not change with respect to a fixed frame of reference. For example, the benches on the platform of one subway station never move down the tracks to another station. (pg37)

5. Distance and Displacement Distance – the length of actual travel or how much an object has moved. Displacement – the length of a straight line drawn from the object’s initial (starting) position to the object’s final position.

6. Distance is the total length of the object’s movement, while displacement is the shortest distance between initial position and final position).

7. (pg37)

8. Gecko displacement and distance (pg37) about 62cm

9. Gecko displacement and distance (pg37)

10. Positive and negative displacement In the Physics text, unless otherwise stated, towards the right or east will be considered the positive direction, and left or west will be negative.

11. (pg 38) #1

12. #1 answer

13. #2

14. #2 answer

15. #3

16. #3 answer

17. #4

18. #4 answer

19. #5

20. #5 answer

21. Physics Classroom web site http://www.physicsclassroom.com/Class/1DKin/U1L1c.cfm

22. Total displacement is the distance from position A to position D