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!

Tensile Forces

  1. Nov 9, 2008 #1
    1. The problem statement, all variables and given/known data

    A circular steel wire 1.91m long must stretch no more than 0.0024m when a tensile force of 450N is applied to each end of the wire.

    What minimum diameter is required for the wire?

    2. Relevant equations

    [tex]p=\frac{F}{\Delta A}[/tex]

    3. The attempt at a solution

    I can't seem to solve for this at all. I've tried applying a volume to this exercise:

    [tex]A=V/l[/tex], where l is the length, then [tex]dA=\sqrt{dV/l-Vdl/l^2}[/tex]...

    [tex]p=\frac{F}{\Delta A}=\frac{F}{\sqrt{dV/l-Vdl/l^2}}[/tex]. This didn't work, as far as I remember...
  2. jcsd
  3. Nov 9, 2008 #2


    User Avatar
    Homework Helper

    Perhaps you want to look at Young's Modulus for the wire?

  4. Nov 9, 2008 #3
  5. Nov 9, 2008 #4
    I solved and got 2.1mm...

    It's not correct.
  6. Nov 9, 2008 #5


    User Avatar
    Homework Helper

    It's not what I got either.

    Maybe re-check your numbers?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Tensile Forces