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Homework Help: Conserved Energy vs. Used Energy

  1. Dec 9, 2009 #1
    1. The problem statement, all variables and given/known data
    I do not understand what it means to conserve momentum, or conserve kinetic energy etc.


    2. Relevant equations
    the 'laws of conservation.'


    3. The attempt at a solution
    I think of the word 'conserve' as not using or saving. Please help me understand?
    Thank you.
     
  2. jcsd
  3. Dec 9, 2009 #2

    mgb_phys

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    'conserved' in the sense of 'to keep'
    Energy is conserved means there is no energy gained or lost in the process.
     
  4. Dec 10, 2009 #3
    Oh. So...position and/or motion.....sorry....i'm still lost here...please help?
     
  5. Dec 10, 2009 #4

    cepheid

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    It's not really clear what you're asking. Can you clarify what you are still having difficulty with? Did you understand what was in mgb_phys's post?
     
  6. Dec 10, 2009 #5
    What "energy" is gained or lost? Gained or lost from where? What is energy?
     
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