1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    f=ma
    trigs


    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
    ohhhhhh
    thank you so much !
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook