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Need help for last problem in homework

  1. Nov 1, 2012 #1
    I was able to solve all my other problems for homework but I'm having problems with this one.
    Any help would be appreciated. Thanks


    A 1200 kg frictionless roller coaster starts from rest at a height of 19 m. What is its kinetic energy when it goes over a hill that is 11 m high?
     
  2. jcsd
  3. Nov 1, 2012 #2
    Hint: Conservation of energy
     
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