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Vector force conceptual exercise help.

  1. Feb 1, 2010 #1
    1. The problem statement, all variables and given/known data

    This was a problem I needed help on.
    A train is traveling up a 3.73 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction.
    a). how long does it take for the last car to come to rest momentarily?
    b). how far did the last car travel before momentarily coming to rest?

    2. Relevant equations

    I'm thinking I use some vector quantities/nature of forces?

    3. The attempt at a solution
     
  2. jcsd
  3. Feb 1, 2010 #2
    g*sin(3.73) to find the force of gravity. find the y vector of the speed and ignore the x vector for now.
     
  4. Feb 3, 2010 #3
    Thanks. Got it
     
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