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Incline slope with friction

  1. Oct 5, 2015 #1
    A tractor pulls a 5000kg asked up a hill at a constant velocity. If the hill had a constant grade of 30° with respect to the horizontal and there is a 10,000 N frictional force between the sled and the ground, what is the minimum force the tractor must exert on the sled?

    I think I'm supposed to tilt the axis. The Friction is already given so how do I find the force required?
     
  2. jcsd
  3. Oct 5, 2015 #2
    Draw a freebody diagram, resolving gravity along a set of coordinate axis parallel and perpendicular the the slope. This will give you the the force along the slope due to gravity, which needs to be counteracted by friction.
     
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