Solving Tension on Wires Homework

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The problem involves calculating the tension in wire AB, which is at a 60-degree angle to the horizontal and supports a 75N bird feeder. An initial calculation suggests the tension is 84.6N, but there is uncertainty about the accuracy of this figure. It is emphasized that the tension in the other wire must also be considered to solve the problem correctly. To find the accurate tension, applying the conditions for equilibrium is necessary.
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Homework Statement




A 75N bird feeder hangs from a vertical wire that is connected to two other upper wires that are attached to a horizontal support, as shown in the figure

On a copy of the diagram, draw arrows to indicate the forces present in the wires

2illvug.jpg


By considering forces A, calculate the tension in the wire AB, which rests at an angle of 60 degrees to the horizontal.






Homework Equations



No equations given

The Attempt at a Solution



i did this

352i5mp.jpg


75= Ab Sin 60

The answer is 84.6 N

but i don't think the answer is good.
 
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What about the tension in the other wire? You can't ignore it.
 
84.6N is correct? I too am not sure how to do it even though the working must be something easy T.T
 
chrysanthemes said:
84.6N is correct? I too am not sure how to do it even though the working must be something easy.
No, it's not correct. To find the correct answer, apply the conditions for equilibrium.
 
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