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Graphing Motion
DO NOW:-Enter silently-Grab papers from the entrance table-Work on bellringer-Place Homework on your desk
Vocabularydistance-time graph
Objective: • Understand how to read and interpret distance time
graphs• Things to know from them:
• How to read the total distance of an object• How to read how long it takes an object to travel
a certain distance• How to identify what the speed is based on the
sloap of the line• When it moves faster, slower, is at a constant
speed and stops moving
Explore Activity
Turtle Travels
Scientists use tracking devices to monitor the distances different turtles migrate.
Distance vs. Time GraphWhat’s the mistake?
Graphing Speed:
Distance vs. Time Graphs
Phoenix
Denver
Graphing Speed:
Distance vs. Time GraphsSpeed = Slope = Rise/
Rise
Graphing Speed:
Distance vs. Time Graphs
Rise=?
3 h
600 km
Speed = Slope = Rise/
Graphing Speed:
Distance vs. Time Graphs
Rise=?
3 minutes
600 m
Speed = Slope = Rise/
Rise/
Different Slopes
0
1
2
3
4
5
6
7
8
1 2 3 4 5 6 7
Time (hr)
Dis
tan
ce
(k
m)
Run = 1 hr
Run = 1 hr
Run = 1 hr
Rise = 0 km
Rise = 2 km
Rise = 1 km
Slope = Rise/Run= 1 km/1 hr
= 1 km/hr
Slope = Rise/Run= 0 km/1 hr
= 0 km/hr
Slope = Rise/Run= 2 km/1 hr
= 2 km/hr
Question
• Below is a distance vs. time graph of my position during a race. What was my AVERAGE speed for the entire race?
0
2
4
6
8
10
12
14
0 1 2 3 4 5 6
Time (hr)
Dis
tan
ce
(k
m)
Average Speed = Total distance/Total time = 12 km/6 hr= 2 km/hr
Run = 6 hr
Rise = 12 km
Question
• What does the slope of a distance vs. time graph show you about the motion of an object?
• It tells you the SPEED
Question
• Below is a distance vs. time graph for 3 runners. Who is the fastest?
0
1
2
3
4
5
6
7
0 1 2 3 4 5 6 35
Time (h)
Dis
tan
ce
(m
i.)
Bob
Jane
Leroy
Leroy is the fastest. He completed the race in 3 hours
The line would point upward then downward.
D
The line would point straight upward to the right.
C
The line would go up and down.
B
The line would curve upward and to the right.
A
The data in the table below show how far a sea turtle travels over several days. What would the line on a graph of this data look like?
Mini-Assessment
1.
CORRECT
The line shows the path of the object that is moving.
D
The line shows a change in speed if its angle changes.
C
The line in the graph points downward if the object is speeding up.
B
A line with a curve indicates that the object has constant speed.
A
Which statement is true of a distance-time graph?
Mini-Assessment
2.
CORRECT
The Kemp’s ridley sea turtle moved at constant speed while the speed of the green sea turtle changed.
D
The Kemp’s ridley sea turtle changed direction while the green sea turtle did not change direction.
C
The green sea turtle moved faster than the Kemp’s ridley sea turtle did.
B
Both types of sea turtles moved at the same speed.
A
Which statement best describes the data in the graph?
Mini-Assessment
3.
CORRECT
on top of the green sea turtle lineD
between the other two linesC
below the Kemp’s ridleysea turtle line
B
above the green sea turtle line
A
Scientists measured the speed of a third turtle. Starting at zero, it had constant velocity and was 75 km out on day 6. Where on the graph would the line for this turtle fall?
Mini-Assessment
4.
CORRECT
We do
• Work on the handout with your table group
• Voice level 1 (whisper)
Exit Ticket
• Work silently
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