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: About Tension

  1. Nov 11, 2004 #1
    I have the following problem:
    The specimen (rod) is hanging vertically. Weight=P. Young's modulus = E. Area = S. What is the ε-?
    ε = dL/L

    As I know Energy U=V*(E*ε ^2)/2
    And the work is A=P*dL(dL of center of mass)
    In this case A=p*dL/2
    So it must be that ε =P/(E*S)
    But the correct answer is ε =P/(2*E*S)
    Where is the mistake?
     
    Last edited: Nov 11, 2004
  2. jcsd
  3. Nov 11, 2004 #2

    Doc Al

    User Avatar

    Staff: Mentor

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook