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Homework Help: Normal force acting on an loop?

  1. Dec 3, 2007 #1
    Im trying to find the normal force that acts on an roller coaster when going aruond a loop. when the roller coaster is at the top the Fn is always 0 right? And is that the only time its 0?
  2. jcsd
  3. Dec 3, 2007 #2


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    Np. it is not necessarily equal to zero! It's zero only if it is just about to fall (or, in other words, if it barely made it through th eloop)
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