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Homework Help: Tension between two masses and three ropes

  1. Oct 12, 2015 #1
    1. The problem statement, all variables and given/known data
    The system is in equilibrium with the center string exactly horizontal. Find T1, T2, T3, and theta

    2. Relevant equations
    T1cos(angle1)-T2cos(angle2)=0
    T1sin(angle1)+T2(angle2)-mass1=0

    3. The attempt at a solution
    Currently working on mass 1
    When making free body diagrams for this problem, I think it makes more sense to use the two points at which the three ropes connect ( a and b) rather than the masses, due to the rope joining the two. I can't figure out how to incorporate this into the equations. I thought 90 degrees was correct, but that answer was illogical. I think if I'm able to find an angle for T2, the rest of the problem will fall into place.

    Thank you for your help :)
     

    Attached Files:

  2. jcsd
  3. Oct 12, 2015 #2

    ehild

    User Avatar
    Homework Helper

    You meant that figure :

    upload_2015-10-13_5-54-50.png
    Draw the FBD. Explain your notations. What do angle1 and angle2 mean? Your second equation is wrong. Show your work in detail.
     
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