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Force please help

  1. Mar 11, 2006 #1
    What is the relationship between force and energy?
     
  2. jcsd
  3. Mar 11, 2006 #2

    russ_watters

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    Staff: Mentor

    energy equals force times distance
     
  4. Mar 11, 2006 #3
    thanks for the help
     
  5. Mar 11, 2006 #4
    one other thing...

    i know that energy is conserved (the total amount in a closed system is constant), but why is it incorrect to say that force is conserved?
     
  6. Mar 11, 2006 #5
    Usually when we say that something is conserved we mean that it is constant with respect to time. The total energy of a closed system is conserved because that level of energy never changes. There are certainly situations where force might be conserved (such as the weight of a book sitting on a table), but the types of cases where this would occur would be far too restrictive to put into a general theorem.

    -Dan
     
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