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Homework Help: Tension in fishing lines

  1. Sep 9, 2010 #1
    1. The problem statement, all variables and given/known data
    Two fishing lines hook onto one fish. The tensions in the lines are 20N and 30N, the angle between them being 30 degrees. Use a triangle of forces to find the magnitude of the resultant force of the tensions.


    2. Relevant equations
    cosine rule a^2 = b^2 +c^2 -2cbcos(theta)


    3. The attempt at a solution

    Triangle gives b=20, c = 30 and theta = 150.

    Solving Resultant = 10root(6root(3) +13)


    ANSWER IS GIVEN AS 10root(7), don't know how they get to this.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 9, 2010 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Re: Dynamics

    Your answer is correct.
     
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