1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Materials and their use in structures

  1. Mar 28, 2010 #1
    A cable has an unstretched length of 12.0m and is stretched by 1.2 x 10^(-4)m when a 6.4 x 10^(8) Pa stress is applied. What is the strain per unit volume in the cable in J m^(-3), when this stress is applied?

    Any help would be very nice. I dont understand what to do.
  2. jcsd
  3. Mar 28, 2010 #2


    User Avatar
    Homework Helper

    When a graph of stress vs. strain is drawn, up to the yield point (or around there), it is a straight line in the elastic region.

    It forms a triangle. So the area under that graph gives the energy.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook