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Kinetic, Potential, and Mechanical Energy

  1. Nov 11, 2012 #1
    1. The problem statement, all variables and given/known data

    A .420kg ball is throw vertically upward at an intial sped o 12.1 m/s. If the initial potential energy is taken as zero find the bal's kinetic, potential, and mecanical energies a.) at its intial position b.) at 1.75m above the initial position, and c.) at its maximum height



    2. Relevant equations



    3. The attempt at a solution
    I don't know what formula to use guys :( my brain is hurting from organic chem overload.
     
  2. jcsd
  3. Nov 11, 2012 #2

    PeterO

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    Homework Helper

    Expressions for Kinetic energy and Gravitational Potential energy would be a good start.
    You may want to use the standard equations of motion, but KE and PE are all you really need.
     
  4. Nov 11, 2012 #3
    Kinetc energy I use the: K=1/2mv^2 right? gravitational i use the U=mgy ?
     
  5. Nov 11, 2012 #4

    PeterO

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    Those formulae will work
     
  6. Nov 11, 2012 #5
    ok thank you!
     
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