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Homework Help: Physics 11 problem 10

  1. Dec 10, 2006 #1
    1. The problem statement, all variables and given/known data
    An 845N sled is is pulled a distance of 185m. The taskt requires 1.20 x 10^4J of work and is done by pulling a rope with a force of 125N. At what angle is the rope held


    2. Relevant equations
    W=Cos(of theta) Fd


    3. The attempt at a solution
    F=845N
    d=185m
    W=1.20x10^4J
    F=125N
    angle=?

    I know how to do this question if im given an angle but i don't really know what to do when im supposed to be finding the angle.
     
  2. jcsd
  3. Dec 10, 2006 #2
    theta = arccos(W/(F*d)) is how you'd find the angle given that eqn.
     
  4. Dec 10, 2006 #3
    is the right answer 1.0 degrees?
     
  5. Dec 10, 2006 #4

    PhanthomJay

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    Science Advisor
    Homework Helper
    Gold Member

    No. You were given the correct equation , please show how you arrived at your answer.
     
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