1. Sign in Phones up!!! New seating chart.

2. Spurious Graphs As a group, look at your graph. You will need to:
come up with a hypothesis statement that corresponds to the graph
Pick two data points and describe how they relate to your thesis
Come up with a way to test your hypothesis

3. Position vs Time Graphs
Position: A vector quantity that describes the distance from an object to the point of origin.
One way to describe motion is a position vs time graph.
X-axis: time (s) Y-axis: position (m)
The line allows for an estimation of the objects position at any time, even if data isn’t specifically recorded at that moment.
The slope of the line is the object’s velocity

4. Position vs Time Graphs
Interpreting lines on a Position Time Graph
FLAT / HORIZONTAL line = NO motion
STRAIGHT line = CONSTANT VELOCITY (cruise control)
CURVED line = CHANGING VELOCITY (braking, hitting the gas)
The greater the slope, the greater the velocity
A change from positive to negative slope = DIRECTION CHANGE

5. Answer with group

6. Label and List Equation Notice Speculate Explain/Evaluate Summary
Title, x-axis & units, y-axis & units
Equation
Describe the line
Notice
Calculate the slope of the graph (rise over run). If it is curved, tell us if the slope is increasing or decreasing ( ∆𝑌 ∆𝑋 )
Speculate
What is happening to the y-axis variable as the x-axis variable increases
Explain/Evaluate
What can we say about the object being graphed? How is it moving?
Summary
Put it all together

7. Position vs time graphs, think/pair/share
Label and List
Title, x-axis & units, y-axis & units
Equation
Describe the line
Notice
Calculate the slope/velocity of the graph (rise over run). If it is curved, tell us if the slope is increasing or decreasing
Speculate
What is happening to the y-axis variable as the x-axis variable increases
Explain/Evaluate
What can we say about the object being graphed? How is it moving?
Summary
Put it all together
ACCELERATION: a vector quantity that refers to the rate at which an object changes its velocity.
Horizontal, vertical, slope up/down, curved up/down
Don’t put this on your page

12. 1. Write summaries for position vs time graphs 2
1. Write summaries for position vs time graphs 2. Quick analysis of a position vs time graph 3. Tumble Buggy vs Coupe Lab

13. Page 6: Position vs Time analysis
Page 7: Position vs Time Graphs
Page 8: Tumble Buggy vs Coupe Lab analysis
Page 9: Tumble Buggy vs Coupe Lab data

14. Position vs time
Make this note at the top of your paper:
** The slope of the line on a position vs time graph is the object’s velocity. **
SUPER IMPORTANT!!!

15. Summarize Write a summary for each graph:
Summary: (put it all together) “on a _____________ graph, if the line is _____________ , as x-variable increases the y-variable ________________. The object is …”

16. Tumble Buggy vs Coupe Lab: data will be recorded in notebooks

17. Purpose of the lab needs to be written on the lab sheet
Tumble Buggy v Coupe
Purpose of the lab needs to be written on the lab sheet
PURPOSE: The purpose of this lab is to generate, interpret, and compare position vs time graphs for two different vehicles.

18. Tumble Buggy v Coupe DATA: Tumble Buggy Coupe
Position (m) time(s) 0 m 0.5 m 1.0 m 1.5 m 2.0 m 2.5 m 3.0 m 3.5 m 4.0 m
Position (m) time (s) 0 m 0.25 m 0.5 m 0.75 m 1.0 m 1.25 m 1.5 m 1.75 m 2.0 m

19. Tumble Buggy vs coupe
A helpful app for collecting data is hudltechnique
Search for “HUDL” but make sure you get the one that has the “technique” with the name
Free!
Works for both iphones and androids
This lets you take a video and play it back in slower motion with timer on bottom of screen.

20. Tumble Buggy vs Coupe Basic Procedure:
Collect 9 data points for both the tumble buggy and coupe (including the 0,0 point)
You should be recording time at the positions listed in the data table
Mark off the spacing with tape in the hallway (where we did the Falcon Fury 500)
Pull up the tape when you are finished and throw away responsibly, please
Graph data in position vs time graphs
You need to set up the graphs yourselves.
Just have the buggy/car run the entire way through the distance to get times!!!

21. Tumble Buggy vs coupe Interpret and compare graphs
Under the graphs, you should answer the following questions:
What is the difference between the tumble buggy and coupe graph?
Why do they look different -- What can we say about the velocity for the tumble buggy? For the coupe?