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Non-conservaite force and Kinetic Energy

  1. Oct 24, 2007 #1
    1. The problem statement, all variables and given/known data
    True/False If a non-conservative force acts on an object, its kinetic energy must increase.

    2. Relevant equations

    3. The attempt at a solution
    I don't really understand the question, especially the part about a non-conservative force? I thought all forces were conserved, or am I confusing that with something else? However, I think the answer might be True but, the only reasoning behing that is that kinetic energy seems like it would increase over any force...
  2. jcsd
  3. Oct 24, 2007 #2

    D H

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    Staff: Mentor

    Forces aren't conserved. Conserved quantities in classical physics include mass, energy, linear momentum, and angular momentum. What does your text say about nonconservative forces? What is a good example of a nonconservative force?
  4. Oct 24, 2007 #3
    I don't really have a text yet... I am taking the class online and the online e-text is incompleate and unhelpful (I ordered a recommended book and it should be in within the week.) But, the only mention of nonconservative forces is "The work done by a nonconservative force depends on the path through which the force acts." and I read online that an example of a nonconservative force is friction.
  5. Oct 24, 2007 #4
    Never mind, I just happened upon it online. Thanks anyway!
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