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Toboggan physics problem

  1. Nov 3, 2003 #1
    I'm in grade 12 physics and I'm having a lot of trouble so far. I have an assignment due tomorrow but I can't get this one hard question. Any help would be appreciated.

    A 25.6kg child pulls a 4.81kg toboggan up a hill inclined at 25.7 degrees to the horizontal. The vertical height of the hill is 27.3 meters. Friction is negligible.

    a) Determine how much work the child must do on the toboggan to pull it at a constant velocity up the hill.

    b) This part of the question just asks your to repeat a) with a different angle.

    c) The child now slides down the hill on the toboggan. Determine the total work on the child and the toboggan during the slide.

    Thank you for your time.
     
  2. jcsd
  3. Nov 3, 2003 #2
    W = mgh

    add the masses and multiply times gravity and hieght.

    The total work will be zero, up is positive and down is negative.

    Nautica
     
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