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Help with a problem.

  1. May 31, 2005 #1
    I have attached an image of the problem. Which should be the height h (expressed in terms of R) if the ball needs to reach the point Q. The ball will roll without slipping.
    In the image, Q is the highest point in the loop. R is the ratio of the loop (think of it as a circle). H is a point on the straight secton of the track, and it is measured respect to the ground.

    Attached Files:

  2. jcsd
  3. May 31, 2005 #2

    Chi Meson

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    Homework Helper

    I'll give you a push but you have to do the work yourself.

    Consider the minimum kinetic energy the ball must have to just complete this circular loop without falling. This would be the kinetic energy that corresponds to the tangential speed where the normal force from the track just equals zero.

    Does this ring any bells?
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