Warmup: 1) Sit in your assigned table group. 2) Open up your notebook to the “Friction Shoe Experiment.” 3) Under the research heading, sketch the bottom of one shoe for every one at your table group. 4) The better the sketch, the better the hypothesis.

Learning Target With my table group, we will complete the shoe- friction project and record our hypothesis, graph, and analysis on the final poster. With my table group, we will learn from our mistakes and improve our poster by observing the work of other scientists.

Which shoes of the people in your group create the most friction on the most surfaces?

Announcements Turtle Committee meeting Monday after early release. Project boards Friday – lab open after school Basketball players cannot play without passing grade. Fail science fair? A new assignment will be given to you which you must complete on your own time or during a mandatory after school project week. Science fair – Thursday, 2/28. All required to attend. Work with the people in your assigned table groups Problems with Intel application – see Mr. Jamsa today*

Energy Flows through the system Food Chemical Grab and Pull Shoe Mechanical Friction with Floor Thermal

Far side Tuesday on block day

QUESTION: Identify the shoe in your group that would provide the best friction on the most surfaces in the room.

Research Independent Variable: Shoe DV: Force to drag shoe at constant velocity 1) Facts from Bill Nye Video 2) Draw a picture of the souls of the shoes of the people in your group. Write other observations.

Questions to answer from bill nye Friction: The opposing force present when things rub against each other. A) Examples of Friction: B) What increases friction? C) Explain how you hold onto smooth things. D) Describe what you can do to shoes to help increase friction.

On the poster, you must include One of your hypothesis Your data table or a good graph. Your analysis. Leave space – you will want to upgrade later.

hypothesis We believe that on the classroom floor, ____________ shoe will create the most friction because _______________________. We believe that on the carpet, ____________ shoe will create the most friction because_____________________.

Experiment - procedure Material List – shoes, surfaces to be used, spring scale. Set shoe 1 on classroom floor/ carpet. Attach Spring Scale to back of shoe. Pull shoe across surface at a slow and constant velocity. Record reading on Spring Scale. Repeat process on different surface. Repeat steps 1-5 with other shoes. Create a data table to record your results. Show Mr. Jamsa your work before proceeding.

Newtons required to move shoe on two floors Shoe One Shoe Two Shoe Three Floor One Floor Two AVERAGE Carpet One Carpet Two

experiment Follow your procedure, complete your data table, and don’t forget to record your observations. Make a well labeled bar graph with your results.

ON THE POSTER, YOU MUST INCLUDE One of your hypothesis Your data table or a good graph. Your analysis. Leave space – you will want to upgrade later.

Analysis 1) Problems with the experiment include (at least 3)… 2) How we could/ did solve these include… 3) Looking at the data, it appears that…(which shoe won?) 4) Reasons why that ______shoe won include 5) Future studies include…

Final group reflection – back of poster Three key things we learned from our tour around the class includes: A) B) C)