(adsbygoogle = window.adsbygoogle || []).push({}); Static Problem....i am confused

1. The problem statement, all variables and given/known data

The Problem says " A rod is 5 ft long and its weight is 60 lb. one end of the rod is fastened to a vertical wall by a clip. other end is bound by a rop which is attached to point on the vertical wall situated at a 12 ft height from the clip. Now i have to calculate the tension of the rope & the reaction on the clip. "

2. Relevant equations

http://img822.imageshack.us/img822/660/63432505.png [Broken]

If i use the first figure then taking the moment of all the forces w.r.t the point A we get T x 60/13 = 60 X 2.5

T = 32.5 lb wt

again using lami's theorem on the 2nd figure

T/sin90 = 60/sinθ = R/sin(90 -θ)

T = 60/12/13 = R/5/13

using T = 32.5 lb wt we have R =(5/13)* 32.5 = 12.5 lb wt...

but if i use the lami's theorem directly then i get T = 60/12/13 = 65 lb wt...why i am getting two value of T ?????

eventually the answer is that the value of T and R are 32.5 lb wt.

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Static Problem i am confused

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