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Homework Help: Need help to find speed

  1. Dec 15, 2009 #1
    1. The problem statement, all variables and given/known data

    A pitcher throws a baseball toward home plate. The baseball, which has a mass of 145g, approaches the plate with 122 J of kinetic energy. Calculate the speed of the baseball.

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 15, 2009 #2

    rock.freak667

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    *ahem*

    so what about it?
     
  4. Dec 15, 2009 #3
    ummm, how do u figuar it out? We are stumped. I am trying to show a grade 10er how to do this. I dont know this stuff or how to figuare it out.
     
  5. Dec 16, 2009 #4

    rock.freak667

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    it has 122J of kinetic energy, what is the formula for kinetic energy?
     
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