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Homework Help: Vertical circle, miminum radius

  1. Nov 2, 2005 #1
    This is my question
    A fighter pilot dives her fighter plane toward the ground at maximum supersonic speed of 2170 km/hr. She pulls out of the dive on a vertical circle. What is the maximum radius of the circle, so that her apparent weight is never more than six times her weight?

    I have no idea how to approach this. However, I know apparent weight= mg+ma, and a_c= V^2/r

    Help needed!:eek:
  2. jcsd
  3. Nov 2, 2005 #2
    well solve your second eq for a then sub it into your first and have it equal to 6*w
  4. Nov 2, 2005 #3
    How do I find the centripetal acceleration? radius?
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