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Normal Force of a skateboarder at the bottom of a circular ramp

  1. Oct 9, 2006 #1
    A skateboard track has the form of a circular arc with a 3.75 m radius. A 47.0 kg skateboarder starts from rest at the top of the circular arc. What is the normal force exerted on the skateboarder at the bottom of the circular arc?
    I tried using conservation of energy to solve for v
    mgh=1/2 mv^2
    and then I tried plugging that in for F=mv^2/r but it didn't work. How are you supposed to do this problem?
  2. jcsd
  3. Oct 9, 2006 #2
    The weight of the skateboarder is also part of the normal force.
  4. Oct 9, 2006 #3
    So how do I factor that in with the other force equation?
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