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Sliding vs Rolling

  1. Dec 30, 2008 #1
    1. The problem statement, all variables and given/known data
    "Suppose the sloping surface was very slippery so no rolling occurs (the can slides). Would the can reach the bottom sooner or later compared with the rolling motion? Explain the difference"



    I don't know if its relevant, but the slope was 4cm at the high end, and 1.5 meter long.
     
  2. jcsd
  3. Dec 30, 2008 #2
    What do you think?
     
  4. Dec 30, 2008 #3
    I read somewhere that rolling has less translational KE, and that sliding makes it to the bottom first....
    This makes me even more confused
     
  5. Dec 30, 2008 #4
    ya your right.

    basicly gravitional energy is converted into translational KE and rolling energy (for the rolling one)
    so
    [tex] mgh=\frac{1}{2}mv^2+\frac{1}{2}I \omega^2 [/tex]

    what are you confused about?
     
  6. Dec 30, 2008 #5
    Ohhhh ok.
    Thats brilliant, thanks for your help
     
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