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[Solved] 3 Dimensional Equlibirum - Statics (Astar, plz help)

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SGVaibhav:
erm no...

rBC = 0.3i - 0.6j + 0.2k
|rBC| = 0.7

Since there is no reaction Max  (MAx)


(-300 x 0.6) + (0.2 / 0.7 x Tbc) = 0
Therefore Tbc = 1050 N
I did not understand the part in bold.   Why is only the k component considered in this equation?

astarmathsandphysics:
I cant make out the diagram properly. Is the bar holding the weight at z=0

SGVaibhav:

--- Quote from: astarmathsandphysics on June 15, 2010, 11:36:54 am ---I cant make out the diagram properly. Is the bar holding the weight at z=0

--- End quote ---
yep =)
see my calculations
its all correct, but there is one part in the bold, which i dont understand.
lol i edited it like 5 times to put sigma properly

astarmathsandphysics:
is BC paralell with y axis?

SGVaibhav:

--- Quote from: astarmathsandphysics on June 15, 2010, 11:49:53 am ---is BC paralell with y axis?

--- End quote ---
nop
the position vector rBC describes it path from B to C.

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