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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

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

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

Answer with group

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

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

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

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

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!!!

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 …”

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

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.

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

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.

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!!!

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?