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Shoes and Friction

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  1. Dec 3, 2014 #1
    1. The problem statement, all variables and given/known data
    I know what friction is and how to get the coefficient of friction. The science fair I'm doing is basically two labs but the overall question is "How does different temperatures affect the coefficient of friction in shoe brands?"

    2. Relevant equations
    Need help understanding how friction in shoe soles worn and how different shoe soles effect different coefficients of friction. This is for science fair. I have the experiment and results I just don't know why I got the results I did.

    3. The attempt at a solution
    My experiment. If the results are needed someone can tell me.
     
  2. jcsd
  3. Dec 3, 2014 #2

    BiGyElLoWhAt

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    Isn't the whole purpose of a science fair project to do an experiment and draw conclusions based on the results? I think the results are completely necessary.

    What happens to the sole of a shoe after you wear it for a year? Is it the same? How does that affect the friction when walking?

    How does the grip of moutain climbing shoes compare after an extended period of use?
     
  4. Dec 3, 2014 #3
    Yeah sorry didn't think that through. I'm not home at the moment but I'll scan the papers on the computer tonight and post them on here tomorrow
     
  5. Dec 3, 2014 #4

    BiGyElLoWhAt

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    No problem. We'll be here.
     
  6. Dec 3, 2014 #5
    Here is the research information. As mentioned earlier I am doing two labs so two of everything. Thanks a bunch!
     

    Attached Files:

  7. Dec 3, 2014 #6

    haruspex

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    Your table of results came out upside down in the image. Some responders might care to try some analysis on the data, but they're not going to bother if they have to type it all in from hand-written. Please post a machine-readable table/spreadsheet (which I'm sure you will be needing anyway).
     
  8. Dec 3, 2014 #7
    Sorry I'll do it tomorrow thanks a bunch
     
  9. Dec 4, 2014 #8
    OK so I'm not sure how to put my results. I have 4 different results for 6 different shoes. I'm thinking to share the info through bar graphs of each lab and how the shoes did and then bar graphs of individual shoes. Would that be a good way for me to display my results to the forums and for my board?
     
  10. Dec 4, 2014 #9

    haruspex

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    For this forum, the raw data would be best. Can you create it as a .csv file and paste it as text?
     
  11. Dec 4, 2014 #10
    Here is my research paper and results. Best I was able to do was screenshot the data. Thanks for the help so far and future help you are giving. If you have any questions that would help you help me just ask. And what do you think of this project? Im in 8th grade by the way so how is it for an 8th grade project. And if you need pictures of the shoes I can send those too!
     

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  12. Dec 4, 2014 #11
    Freezer Temperature  18°C 0°F   Google Sheets.png Fridge Temperature 3°C 37°F   Google Sheets.png
     

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  13. Dec 4, 2014 #12

    haruspex

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    No, you can do better that. You have the data in a spreadsheet. Save it as a .csv file, choosing semicolon as the field separator, say. Change the file type to .txt. Paste the text into a post.
     
  14. Dec 4, 2014 #13
    1. Sorry didn't hit the reply button
    2. For the conclusions I came up with were: The foam type shoes were the worst for static friction. If you rank every shoe, where they preformed best to worse using 1-4 then add up the columns like add up fridges column with all its numbers you find out that shies perform best in room temperature followed by a not that big difference in the cold but terrible in heat
     
  15. Dec 4, 2014 #14
    Ok sorry I'll get onto that. It's just I saved it as csv like you said earlier I just didn't know to change it to text and post it and when I tried to post the csv It wouldn't let me. And what about the pdf? Alright with that?
     
  16. Dec 4, 2014 #15

    haruspex

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    I have no experience of science fairs, so I won't be reading through that. Mainly I was trying to help you post your question in a manner more likely to get a useful response from others. But I will take a look at the data when you post it machine-readable.
    My response so far is - only two temperatures?
     
  17. Dec 4, 2014 #16
    OK a few things. When I go to save it, it only haves a CSV comma delimited and nothing on semicolon. And I have 1 temperature in the first lab where I am testing the force of static friction on shoes. And in the second lab I have 3 temperature, Oven;fridge;freezer. And in the end I compare them all. The problem is I can't very many conclusions on the coefficient of static friction on shoe soles. Another question is can the first guy who commented on this thread get alerts or do i have to reply to him
     
  18. Dec 4, 2014 #17

    haruspex

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    Strange... I use OpenOffice Calc, not XL, and if I save a file as type .csv it prompts for several options, one of which is the field delimiter. But if you have no commas in the fields, comma delimited is fine.
    OK.
    You missed something in there.
    BYW should be getting alerts. If you want to give him a prod, send a private message.
     
  19. Dec 4, 2014 #18
    How is this?
    This is my freezer results:
    Shoes;Fn;Fs;μs;Rank Overall
    Nike Air Flights;4.645;3.219;0.693;4th
    Converse All Stars;4.121;2.886;0.7003;3rd
    Reebok Zigtech;2.257;0.73;0.323;6th
    Hunter's Bay Men's Spencer Oxford;4.804;3.731;0.7766;2nd
    Adidas;3.364;2.88;0.856;1st
    Saucony Progrid;3.634;1.771;0.4873;5th
    This is my fridge results:
    Shoes;Fn;Fs;μs;Rank Overall
    Nike Air Flights;4.645;3.525;0.7588;1st
    Converse All Stars;4.121;2.824;0.6852;4th
    Reebok Zigtech;2.257;1.483;0.657;5th
    Hunter's Bay Men's Spencer Oxford;4.804;3.327;0.6925;3rd
    Adidas,3.364;2.443;0.7262;2nd
    Saucony Progrid;3.634;2.432;0.6692;6th
    This is my Room temperature results:
    Shoes;Fn;Fs;μs;Rank Overall
    Nike Air Flights;4.645;3.525;0.7588;1st
    Converse All Stars;4.121;2.824;0.6852;4th
    Reebok Zigtech;2.257;1.483;0.657;5th
    Hunter's Bay Men's Spencer Oxford;4.804;3.327;0.6925;3rd
    Adidas;3.364;2.443;0.7262;2nd
    Saucony Progrid;3.634;2.43;0.6692;6th
    This is my oven results:
    Shoes;Fn;Fs;μs;Rank Overall
    Nike Air Flights;4.645;3.082;0.6635;1st
    Converse All Stars;4.121;2.58;0.626;3rd
    Reebok Zigtech;2.257;1.403;0.6216;4th
    Hunter's Bay Men's Spencer Oxford;4.804;3.045;0.6338;2nd
    Adidas;3.364;1.987;0.5906;5th
    Saucony Progrid;3.634;2.095;0.5764;6th
    This is my overall results:
    Shoes;Freezer;Fridge;Room;Oven
    Nike Air Flights;4th;1st;1st;1st
    Converse All Stars;3rd;6th;4th;3rd
    Reebok Zigtech;6th;3rd;5th;4th
    Hunter's Bay Men's Spencer Oxford;2nd;2nd;3rd;2nd
    Adidas;1st;4th;2nd;5th
    Saucony Progrid;5th;5th;6th;6th
     
  20. Dec 4, 2014 #19

    haruspex

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    Yes, that works (but what are the upper two temperatures? Maybe that's in the PDF - no matter).
    You might have a problem with the freezer case. The results are so scattered I wonder if ambient conditions are distorting the results. When you take the shoes out of the freezer, what might happen that could greatly affect friction, and how might this vary from day to day?
     
  21. Dec 4, 2014 #20
    I honestly have no idea why the results are so different I tested them in the same freezer and at the same location but I had to open the freezer to grab a shoe and then shut it so I wonder if a few seconds of the door opening drastically altered the temperature that quickly that it would throw off the results
     
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