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Homework Help: Kinetic Energy stuff

  1. Oct 5, 2007 #1
    A 50.5-g golf ball is driven from the tee with an initial speed of 40.4 m/s and rises to a height of 26.5 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 6.02 m below its highest point?

    A: 28.0838075 J
    b: ????

    what do i do for part b?
     
  2. jcsd
  3. Oct 5, 2007 #2

    learningphysics

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    Homework Helper

    First find the kinetic energy at that height... do it the same way you did for part a...

    when you have the kinetic energy, you can get speed.
     
  4. Oct 5, 2007 #3
    0 = mgh + mv^2/2 right? This way find v.
     
  5. Oct 5, 2007 #4
    For Part B he is right... Do the same thing except with a height of 20.48 instead. Just subtracting less Potential Energy since the ball is now gaining more Kinetic.
     
    Last edited: Oct 5, 2007
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