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Roller Coaster Car Driving

  1. Oct 14, 2008 #1
    1. The problem statement, all variables and given/known data

    As a roller coaster car crosses on the top of a 10 m radius hill (the track is underneath the car), its apparent weight is one-half its true weight. What is the car's speed at the top?


    2. Relevant equations


    A=v^2/r
    F=ma

    3. The attempt at a solution

    I tried saying the weight was .5 and solving for velocity, but I still have a missing # for the Force variable.
    Where do I go from there?
     
  2. jcsd
  3. Oct 15, 2008 #2

    tiny-tim

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    Welcome to PF!

    Hi hbteen! Welcome to PF! :smile:
    The weight doesn't matter … it cancels out. :wink:

    Show us what you tried, and then we'll see where the problem is. :smile:
     
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