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Vertical Cetripetal motion

  1. Jun 5, 2013 #1
    1. The problem statement, all variables and given/known data
    A roller coaster with radius of 19.6 and at the top of the roller coaster the veloctiy is 14 m/s and the apparent weight is 0. Calculate the veloctiy at the bottom of the roller coast?

    2. Relevant equations



    3. The attempt at a solution
    I can see that Mv^2/r=mg at the top but i don't get how to solve for the veloctiy at the bottom of the equation of mv^2/r = Fn-mg. Am I looking in the right direction? I've done the force body diagram but the only way i can see to get out the velocity is with mass, am I missing an equation?
     
  2. jcsd
  3. Jun 5, 2013 #2

    haruspex

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    Think about potential and kinetic energy.
     
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