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Projectile and work problem

  1. Jun 21, 2009 #1
    1. The problem statement, all variables and given/known data
    a .50 kg ball thrown upward has an initial Kinetic energy of 80 J.


    2. Relevant equations

    (a)what are its kinetic and potential energy when it has traveled 3 quarters of the distance to its maximum height?
    (b) speed at this point?
    (c) potential energy at the maximum height (assume a reference is chosen to be zero at the launch point)?

    3. The attempt at a solution
    pls reply...i nid it badly...thnks...im working on it now..
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jun 21, 2009 #2

    dx

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    Gold Member

    Please show your attempt.
     
  4. Jun 21, 2009 #3
    i dont have an idea honestly
     
  5. Jun 21, 2009 #4

    dx

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    Homework Helper
    Gold Member

    Start by finding the maximum height. What is the kinetic energy at the maximum height?
     
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