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!

Interatomic stiffness

  1. Sep 22, 2009 #1
    1. The problem statement, all variables and given/known data
    One mole of iron has a mass of 56 grams and density of 7.87 g/cm^3. You have a long thin bar of iron, 2.0 m long, with a square cross section, 0.12 cm on a side. You hang the rod vertically and attach a 151 kg mass to the bottom, and you observe that the bar becomes 1.03 cm longer. Calculate the effective stiffness of the interatomic bond, modeled as a "spring":


    2. Relevant equations
    Y= (F/A)/(dL/L
    Y=ks/d

    3. The attempt at a solution
    Y=[(151*9.8)/(0.12e-2)2]/[(1.03e-2)/2]
     
  2. jcsd
  3. Sep 22, 2009 #2
    nvm i solved it
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook