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Conservation of Energy, Ball going down slope

  1. Jan 5, 2012 #1
    1. The problem statement, all variables and given/known data
    A solid 162 N ball with a radius of 0.350m rolls 5.9 m down a ramp tha is linclined at 33° with the horizontal. If teh ball starts from rest at the top of the ramp what is the angular speed of the ball at the bottom of the ramp?

    2. Relevant equations
    MEi= MEf
    PEg=KE + KErot
    mgh= .5mv2 +.5Iω2
    ω= v/r

    3. The attempt at a solution
    I solved the conservation of energy equasion for velocity then divided by the radius of the ball, but it did not work, am I approaching the problem wrong?
  2. jcsd
  3. Jan 5, 2012 #2


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    Gold Member

    Show your work in detail, please.

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