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Homework Help: Angular Velocity and static friction

  1. Feb 22, 2007 #1
    1. The problem statement, all variables and given/known data
    The coefficient of static friction between the person and the wall is .61. The radius of the cylinder is 6.56 m. An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up against the wall when the loor drops away. What is the minimum angular velocity needed to keep the person from slipping downward?

    2. Relevant equations

    3. The attempt at a solution

    I don't know how to solve this problem because of the coefficient of static friction. Please help
  2. jcsd
  3. Feb 22, 2007 #2


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    Well, ask yourself:
    1. What force provides the person with her centripetal acceleration?
    2. Relative to the wall, is this force a normal force, or a tangential force?
    3. What is the force opposing her weight, and that must balance this in order for her not to slip downwards?
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