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Irregular sculpture hanging from two thin vertical wires

  1. Jul 23, 2009 #1
    i have been stuck on this question for two days, can anyone help!!

    A museum of modern art is displaying an irregular 358 N sculpture by hanging it from two thin vertical wires, A and B, that are 1.25 m apart . The center of gravity of this piece of art is located 48.0 cm from its extreme right tip.

    YF-11-40.jpg

    Find the tension in the wire A.

    Find the tension in the wire B.
     
  2. jcsd
  3. Jul 23, 2009 #2

    berkeman

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    Staff: Mentor

    Two days? Show us the FBDs you've drawn during this period of work....
     
  4. Jul 23, 2009 #3
    I think it's like you have to say that since the object is in equilibrium, there are no external unbalanced forces or torques acting on the system. That means F=ma in the vertical direction (up is +ve) gives you Ta + Tb = << edited out by berkeman >> . Then, assigning counter-clockwise as +ve and using the center of gravity as the point about which to sum moments, you have Tau(net) = 0 = << edited out by berkeman >> . Now we have two equations and two unknowns. Not hard to solve from there. I think that's how you do it, but I'm still learning too, so I'm not sure. :shy: Just trying to help out as much I can. :smile:
     
    Last edited by a moderator: Jul 23, 2009
  5. Jul 23, 2009 #4

    berkeman

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    Staff: Mentor

    Thanks for the help, Gyro. Please remember to only provide hints on homework/coursework questions. We need to have the OP do the bulk of the work.
     
  6. Jul 23, 2009 #5
    I'm sorry about that. Won't happen again.
     
  7. Jul 23, 2009 #6

    berkeman

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    Staff: Mentor

    No worries. Even with the work deleted, you have still provided useful hints to the OP. Thanks.
     
  8. Jun 29, 2011 #7
    Is this set up correct?

    TA + TB - mg = 0 = Ttot (since the object is in equilibrium)

    Im not wure where to go from here or if this is even right
     
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