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Why some materials bounce off more than the others?

  1. Feb 10, 2008 #1
    why some materials bounce off more than the others? What happens with the microstructure?
     
  2. jcsd
  3. Feb 10, 2008 #2

    Astronuc

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    Staff: Mentor

    In other words, why do some materials behave more elastically?

    Materials have different levels of hardness.

    Softer materials will experience plastic deformation at lower stress/load levels than others. There is always some permanent deformation at the contact surfaces.
     
  4. Feb 10, 2008 #3
    And what is that free energy of the molecules?
     
  5. Feb 10, 2008 #4

    Astronuc

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    Staff: Mentor

    Please elaborate on your question about bouncing off and your use of free energy.

    By free energy, does one mean Gibbs free energy?
     
  6. Feb 11, 2008 #5
    I mean like (lets say) basketball.
    Why it bounces more than some wood or rock?
     
  7. Feb 12, 2008 #6
    Astronuc?
     
  8. Feb 12, 2008 #7

    stewartcs

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    Science Advisor

  9. Feb 12, 2008 #8
  10. Feb 12, 2008 #9

    stewartcs

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    The weight of the baseball like the article says.

    CS
     
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