1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How odometer works ?

  1. Oct 29, 2012 #1
    How odometer works ??

    I get a problem ,my university professor for physics 1 ask me to search about work of odometer in physical view ,I mean he doesn't want to describe the mechanical or electronic odometers !!he wants me to write physical formulas and measure the distance which cars travel the same as what odometer does !!!and it should be at least 4 page . I some how search and I understand that electronic or mechanical ones measure the rpm of wheels and then convert this to kilometer or mile and this can be like this : number of revolution * radius of wheel * 2 * pi
    but I some how confused that rpm is not number of revolution ,Is there any timer in cars???? or maybe I am completely wrong and my professor wants other things so what do you suggest me to search about ???and is there any link ,book you can suggest me ??? any idea ??
     
  2. jcsd
  3. Oct 29, 2012 #2

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Re: How odometer works ??

    Are you sure that a mechanical odometer measures rpm? Think about how it is constructed.
     
  4. Oct 29, 2012 #3
    Re: How odometer works ??

    Hi SteamKing
    you are right but my problem is that none of these relate to physics and my professor insists that he just wants physic formulas or s.th like this!!and it should be at least 3 or 4 pages !!what do you think he wants ???I am really confused ,these are so simple !!!
     
  5. Oct 29, 2012 #4

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    Re: How odometer works ??

    Before 1900, odometers worked by counting revolutions. For those it was a simple matter of gearing down enough to be counting in the desired units.
    Nowadays, the rate of rotation is measured and this drives both the odometer and the speedometer. For that, you need to be integrating the rate over time.
    But to make that go 4 pages you'll have to use a large font.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: How odometer works ?
  1. How do motors work? (Replies: 6)

  2. How do Mirages Work? (Replies: 4)

  3. How to find work done. (Replies: 1)

Loading...