Recent content by Rhods

  1. R

    Undergrad Unlock the Secret of Phone Book Friction

    Well, I think I've finally got it! Thank you all for your input (and patience!). In case anyone is interested - because you never know - I have compiled a two page report discussing this topic. It's attached as a PDF (and editable word version), entitled with probably one of the most cheesy...
  2. R

    Undergrad Unlock the Secret of Phone Book Friction

    Very true, if the tape were not apparent, I suppose the pages would be held together by a suction force between the pages and possibly by the weight of the sheets themselves, depending on the phone book's orientation during testing. It would be interesting to know what the transverse force is...
  3. R

    Undergrad Unlock the Secret of Phone Book Friction

    Yes, I understand that, I was using the diagram to illustrate the sentence quoted in the same post, apologies for the confusion.
  4. R

    Undergrad Unlock the Secret of Phone Book Friction

    interesting... From the http://www.hometheaterforum.com/htf/after-hours-lounge/143245-friction-formula.html" of course.
  5. R

    Undergrad Unlock the Secret of Phone Book Friction

    I think the tape was there to stop the pages from 'flapping around' and unravelling themselves as suggested by mjsbuddha, not to supply a compressive force - at least not a greatly influencing one (c'mon are you serious, parcel tape, 600kg...I smell a mythbusting opportunity!). Are you...
  6. R

    Undergrad Unlock the Secret of Phone Book Friction

    Originally quoted as: "Although a larger area of contact between two surfaces would create a larger source of frictional forces, it also reduces the pressure between the two surfaces for a given force holding them together." Written more clearly: "Although a larger area of contact between two...
  7. R

    Undergrad Unlock the Secret of Phone Book Friction

    I have to say, I am flabbergasted by the response I have had here this far and wish to thank you all. Like all the best answers, Lojzek's is brilliantly http://www.youtube.com/watch?v=8BbUhlIEZEY" (aka embarrassingly obvious), well done for lifting the fog that shrouded this myth.
  8. R

    Undergrad Unlock the Secret of Phone Book Friction

    Thank you for all your great posts, but I think we’re yet to get to the bottom of this! In relation to Russ' comment: Although a larger area of contact between two surfaces would create a larger source of frictional forces, it also reduces the pressure between the two surfaces for a given...
  9. R

    Undergrad Unlock the Secret of Phone Book Friction

    Hello All, A very interesting and entertaining video that you may have spotted recently floating around the web: http://www.youtube.com/watch?v=6sIB2kL-BWc" What I am wondering is, how on Earth is such a massive resistance force developed? I have a few (basic) ideas: 1. The large surface area...