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Person in cart traveling down a valley

  1. Feb 23, 2014 #1
    1. The problem statement, all variables and given/known data

    A 60 kg person rides in a 20 kg cart
    moving at 13 m/s at the bottom of a valley that is in the shape of an arc of a circle
    with a radius of 36 m. What is the apparent weight of the person as the cart passes
    the bottom of the valley?

    2. Relevant equations

    F=(V^2/r) * (m1 + m2)

    3. The attempt at a solution
    Fnet = Fn - Fg
    m(V^2/r) - mg
    80(169/36) - 80(9.8)
    = -408.44
    ...im stuck. I don't feel like this is right and I don't know where I really went wrong
    Last edited: Feb 23, 2014
  2. jcsd
  3. Feb 24, 2014 #2
    You have the right equations and all, but take a step back for a second. In the context of the problem, what does apparent weight represent? What quantity represents it?
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