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!

Special Relativity

  1. Sep 29, 2005 #1
    A meter stick moves past you at great speed. Its motion relative to you is parallel to its long axis.

    If you measure the length of the moving meter stick to be 1.00 ft (1ft=.3048 m), for example by comparing it to a one-foot ruler that is at rest relative to you, at what speed is the meter stick moving relative to you?

    The only thing I can figure out is that one foot is the proper length. I'm completely confused about the rest.
  2. jcsd
  3. Sep 29, 2005 #2

    Tom Mattson

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    OK, here's a hint: This is a problem in length contraction.

    What do you know about length contraction?
  4. Sep 29, 2005 #3


    User Avatar

    Staff: Mentor

    No, the proper length is the length that would be measured by someone who is moving along with the meter stick (like a witch riding a broomstick :devil: ). So the proper length of a meter stick is one meter.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Special Relativity
  1. Special relativity (Replies: 0)

  2. Special Relativity (Replies: 12)