1. Entry: 3
Date:
Describing Motion

2. 1. What is Motion?
A. when the distance from one object to another object changes B. Determined by using a reference point (point of reference)

3. 2. What is a REFERENCE POINT
A. A stationary object used to determine motion.
B. If distance between reference point and object changes then there is motion. OR
An object is in motion when it is continuously changing its position relative to a reference point and as observed by a person or detection device. In other words, motion is a study of relative position, speed, and acceleration. Isaac Newton stated three laws of motion that explain its functions and restraints

4. I. Example Person on a bus
a. person to bus: not in motion distance is not changing b. Person on bus to building: is in motion distance is changing

5. 3. Distance vs Displacement
A. Distance is how far you traveled
B. Displacement is the distance between the starting and ending points and the direction in which you travel.

6. Example
If you travel in a straight line your distance and displacement are the same

7. b. Turn a corner so now distance and displacement are different.

8. c. Back to start so
distance is the
amount you
traveled and
displacement
is zero

9. 4. What is Direction?
A. the line, or path along which something is moving, pointing, or aiming. B. Is measured using a reference point I. up, down, right, left, north, south, east, etc.….

10. 5. What is Speed?
Is a rate or ratio
calculates how far something moved in a given time
I. Speed = distance / time
II. Includes the units for distance and time.
a. mph = miles per hour

11. Entry: 4
Date:
How to Graph Motion

12. 1. Graphing Motion A. aka: Distance-Time graph
B. Used to represent how speed and distance change with time
C. Always a line graph

14. - I. Time is on the x-axis - II. Distance is on the y-axis.R Y
MIX

15. 2. Line slope
- A. Tells the relative speed

16. I. Steep lines = faster speed

17. II. Flatter (less steep) = slower speed.

18. III. Horizontal line = zero speed (the object is not moving).

19. Dsitance-Time Graph

20. 3 . Motion graphs include:

21. Apply: Copy the data table then draw a graph showing Karla’s walk.
Time (s)
Distance (m) 1 10 2 15 3 20 4 5 35 6 50

22. Your graph should look like this.
Karla’s walk 50 45 40 35 30 25 20 15 10 5
Distance (m)
Time (s)