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Homework Help: Circular Motion

  1. Nov 16, 2011 #1
    A person drives a car over the top of a hill, the cross section of which can be approximated by a circle of radius r=250m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill?

    I know that the maximum speed occurs when the normal force= zero. And by my calculations vmax=√rg (where r is the radius and g is the acceleration of gravity)

    Is this all I need? Am I missing anything?
  2. jcsd
  3. Nov 16, 2011 #2


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    Seems ok to me. What to you think you might be missing?
  4. Nov 16, 2011 #3
    I didn't think there was anything missing, this is just me being paranoid I guess. Thank you
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