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Moment of inertia question; tube, solid cylinder on inclined plane.

  1. Sep 7, 2012 #1
    If you have a tube and a solid cylinder of the same dimensions and density and rolled them down an inclined plane the 'tube' would cover the same distance in less time?
     
  2. jcsd
  3. Sep 7, 2012 #2
    I'm pretty sure that the answer is the same distance at the same time. Both tubes have the same acceleration throughout their motions. I don't think it matters that they're rolling. The solid one has more potential energy because of its greater mass, but in the equation for conversion of potential energy to kinetic energy the mass cancels out.
     
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