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Homework Help: Variably Solving for Minimum Tangential Speed

  1. Sep 22, 2009 #1
    1. The problem statement, all variables and given/known data
    A ride at a carnival rotates about a vertical axis. When spinning fast enough the bottom is dropped and the rider sticks to the side. Find the minimum tangential speed so that the rider does not fall. R=radius of circle, u= coefficient of static friction and g represents gravity. The answer must be in these terms.

    2. Relevant equations
    F = ma
    F = un
    Ca = v^2/r
    3. The attempt at a solution
    V = sqrt (Ca*r)

    I think I am missing something here, as it is not with respect to the right variables. Any hints on what to do next, or if I am heading down the wrong path?
  2. jcsd
  3. Sep 22, 2009 #2


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    Homework Helper

    What is the normal reaction of the surface?
    In which direction the frictional force acts?
    What should the condition so that rider does not fall?
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