- #1
Scatteredheroes
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Homework Statement
An 11 kg traffic light hangs fro ma structure as shown.
The aluminium pole AB is 7.5 m long, and weighs 8 kg. Determine the tension in cord CD
Homework Equations
T = rf[/B]
The Attempt at a Solution
Ignore the AC height of 3.8 m, and replace it with an AD length of 7.5 m.
Would the pivot point be A or D?
If D, how would I find the r for D to B?
For the equation ΣT = r1f1 + r2f2 + r3f3, with r1f1 being the pole, r2f2 being traffic light, what would the cale be as?
I understand how to do the calculations, but looking at this I'm not entirely sure on how to get the F for the cable.
I know that it'll be either sin or cos 37 to take into account the angle, but I'm lost.