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Solving work energy problems, with velocity and friction as givens.

  1. Dec 16, 2012 #1
    I need to solve a work energy equation for height that has initial velocity, final velocity, and work done by friction as the only givens, I don't want to give the full problem, but I can't even find how to do that in my physics book so any help would be appreciated. right now I have KE1+GPE1-Friction=KE2
     
  2. jcsd
  3. Dec 16, 2012 #2

    haruspex

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    You will at least need to disclose what it is that you are asked to find.
     
  4. Dec 16, 2012 #3
    He needs to find the height. Can you make up a problem based on the given one? (Change all the numbers and wording)
     
  5. Dec 16, 2012 #4

    haruspex

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    Hmm.. yes, missed that.:blushing:
    Ok, so you have an equation regarding energy, and presumably you can write down expressions for KE etc. if only you knew the mass. Is that the problem? If so, just put in an unknown for mass and hope it cancels. (If the friction is proportional to the mass then it will.)
     
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