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# Find forces on cables of cable car

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Above is my attempt at this physics problem, but It's too hard. What do I do? Thanks

Feb 5, 2019

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If hanging cable makes 60 degrees with sliding cable.....how can sliding cable be at 30 degrees ?      That would make hanging cable at -90 degrees....which it is not.     Need actual sliding cable degrees..........or the degrees between the hanging cables.   Do you have the correct numbers?

Feb 5, 2019
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Regarding the question itself, that is all she gave me. You can probably see that "the hanging cables make 60° with the sliding cable" isn't very specific at all. Otherwise, I'm not really sure at all how to get the correct degree values here. Is using that X-axis as a reference incorrect?

CurlyFry  Feb 5, 2019
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Well we need to know the angle between the hanging cables to get anywhere......each of the hanging cables has a different angle with reference to the sliding cable......something is wrong with the wording of the question....perhaps the hanging cables form a 60 degree angle?    I do not know....from what is given...I can not go any further without additional info.....

ElectricPavlov  Feb 5, 2019
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CurlyFry  Feb 5, 2019
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OK !   Keep me posted....

ElectricPavlov  Feb 5, 2019
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She got back to me!

So the three angles beneath the sliding cable all equal 60 degrees, equalling 180 degrees total.
Hope that helps! I can further clarify if needed

CurlyFry  Feb 5, 2019
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I'm sorry...I am still a little unclear.    From the digram you have drawn, is she saying the angle between the sliding cable and the first arm is 60 degrees   and the angle between the two arms is 60 degrees and the angle between the second arm and the cable is also 60 degrees? (meaning one arm is longer than the other)  Do I have that correct?    I'm pretty sure I still need the angle of the sliding cable.....is it 30 degrees as your diagram is labeled?

The tensions in the two arms will be different from each other.    The magnitude of the  horizontal components must equal each other in opposite directions and the vertical components of the tension in the two arms must sum to the weight of the car (7600kg)....I do not think I can calc that until I have the angle of the sliding cable and clarification of  the  60 degree angles...

Hope I am not making this muddier than it really is supposed to be!

ElectricPavlov  Feb 5, 2019
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Here is what I meant by all that. The top line (sliding cable) is 180°, while the three angles below are all 60°. This made it WAY easier

CurlyFry  Feb 5, 2019
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Yah!   That DOES make it way easier.....did you get an  answer?

ElectricPavlov  Feb 5, 2019