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Homework Help: Young's Modulus ~

  1. Mar 15, 2005 #1
    Young's Modulus ~ Please Help!

    I can't solve part (b), actually I don't know how to solve it!

    Attached Files:

  2. jcsd
  3. Mar 16, 2005 #2
    you need the assumtion in part a to do part b...
    F=dU/dr for each atom/molecule
    and young modulas is just F/A * L/delta L
  4. Mar 16, 2005 #3
    I have tried to differentiate the equation in part (a), therefore,
    (dU/dr)r=ro = 0

    However, after solving, the equation that I got is quite different from the given one. I don't know where the (omega) comes from.
  5. Mar 17, 2005 #4
    Does omega equal to 4/3 pi r^3
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