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Homework Help: Force of water on a pulled barge with angle

  1. Feb 21, 2009 #1
    1. The problem statement, all variables and given/known data

    Suppose that the horse pulls on the rope with a force of 7900 N at an angle of 18° to the direction of motion of the barge, which is headed straight along the canal. The mass of the barge is 9200 kg, and its acceleration is 0.10 m/s2. What are the magnitude and the direction of the force on the barge from the water?

    (a) Magnitude

    (b) Direction (counterclockwise from the +x axis is positive)

    2. Relevant equations


    3. The attempt at a solution

    I trigged it;

    (mass of the barge x the acceleration)-force of the horse cos (angle) = nope

    Attached Files:

  2. jcsd
  3. Feb 21, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What forces act on the barge? (The force of the water will be your unknown.) What's the net force on the barge? Set the net force = ma. Consider components parallel and perpendicular to the direction of motion.
  4. Feb 21, 2009 #3
    thank you so much !
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