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I need some help quick

  1. Apr 21, 2004 #1
    A solid sphere of radius 0.100m and mass 14.3kg rolls without slipping up a surface inclined at 30 degrees to the horizontal. At a certain initial position the sphere's total kinetic energy is 90.1J.
    (a) How much of this initial kinetic energy is rational?
    (b) What is the speed of the center of mass of the sphere at the initial position?
    After the sphere has moved 1.00m up along the incline from its initial position:
    (c) What is its total kinetic energy?
    (d) What is the speed of its center of mass?
  2. jcsd
  3. Apr 21, 2004 #2
    "rational?" rotational is what I think you meant to write. Well, it would be nice to have some energy to converse with. I do believe I have some energy to help you anyway.

    Well, what's the first item you do not understand how to compute, for example, the moment of inertia of the sphere? aah gotta go
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