1. Chapter 4, Section 2
Graphs of Motion

2. Graphing Video

3. Graphs of Motion

4. Position vs. Time slope of a position vs. time graph = speed
Slope = Rise (y values)
Run (x values)
Slope = y2 – y1
x2 – x1
= 150 m – 0 m
30 s – 0 s
= 5 m/s

5. Calculating Slope
Find the slope of this line:
Slope = y2 – y1
x2 – x1

6. Calculating Slope For what time period(s) is the object:
a) Coming back?
b) Moving at a constant speed?
c) Not moving?

7. Position vs. Time
You can use position vs. time graphs to compare the motion of different objects.
A steeper line on a position vs. time graph means a faster speed.

8. Which graph shows two runners moving at the same speed?B C D