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This should be an easy one: Work required to change speed

  1. Oct 11, 2004 #1
    Hi, I apologize for the simplicity here, I'm just getting started. Here's the question:

    An object has kinetic energy, K. How much work do you have to do to double the speed of the object?

    Any suggestion on how to start this would be much appreciated. :smile:
     
  2. jcsd
  3. Oct 11, 2004 #2
    The work-kinetic energy theorem states that the work done on a particle equals the change in kinetic energy of the particle. From that statement, you should have enough information to answer your question.
     
  4. Oct 12, 2004 #3

    HallsofIvy

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    In order to use TALewis' hint, you will need to know how kinetic energy depends on speed.
     
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