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Homework Help: Work Done on Cart on Incline+Rest

  1. Oct 5, 2008 #1
    1. The problem statement, all variables and given/known data

    A 10-kg cart starts up an incline with a speed of 2 m/s and comes to rest 2.5 m up the incline. The total work done on the cart is:

    -20J, -12J, 12J, 20J, Impossible to calculate

    2. Relevant equations

    W = Fd
    W = Fdcos(theta)

    3. The attempt at a solution

    I'm not sure how to approach this problem. W = Fdcos(theta) but there isn't a degree of incline given
  2. jcsd
  3. Oct 5, 2008 #2


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    Science Advisor
    Homework Helper
    Gold Member

    If you are familiar with and understand the work-energy theorem, you should use that approach first, since it will be much simpler than an alternate approach. If you are not familar with that theorem, you can determine the net force acting parallel to the incline by first determining the acceleration parallel to the incline, then calculate the work done by that net force.
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