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perfectly inelastic vs. inelastic collisions

Discussion in 'MCAT Discussions' started by badasshairday, May 8, 2007.

  1. badasshairday

    badasshairday Vascular and Interventional Radiology 10+ Year Member

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    Apr 6, 2007
    For some reason I always thought there were two types of inelastic collisions. Perfect and not perfect collisions. I thought that the perfectly inelastic collisions conserved Kinetic Energy as well as momentum while the normal inelastic collisions only conserved momentum but not energy.

    What say you?
     
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  3. evoviiigsr

    evoviiigsr 7+ Year Member

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    Dec 22, 2006
    I think you have it backwards. elastic conserve energy and inelastic loses energy
     
  4. killinsound

    killinsound Physician 10+ Year Member

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    Aug 30, 2006
    both inelastic types do not conserve kinetic energy.

    only perfectly inelastic types stick together.

    that's it.
     
  5. riceman04

    riceman04 10+ Year Member

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    Mar 21, 2005
    Los Angeles
    :thumbup:
     
  6. badasshairday

    badasshairday Vascular and Interventional Radiology 10+ Year Member

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    Apr 6, 2007
  7. Funky

    Funky This space is for sale 10+ Year Member

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    Feb 15, 2006
    NY
    :thumbup:
     
  8. Allierose143

    Allierose143 New Member

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    May 5, 2006
    the MCAT usually asks about perfectly inelastic collisions which do NOT conserve energy but DO conserve momentum-which is how they ask questions.

    Elastic- Energy and Momentum conserved
    Inelastic- just Momentum
     
  9. Shrike

    Shrike Lanius examinatianus 10+ Year Member

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    Apr 23, 2004
    too far south
    All the replies above are correct: all inelastic collisions involve a loss of KE. I'll add, however, that perfectly inelastic collision -- those after which the objects stick together -- produce the maximum possible loss of KE (consistent with conservation of momentum).
     

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