planks in tripod

Reactions of Tripod Made from Wood Planks

Situation
In the figure shown, each plank carries a uniform load of 100 N/m throughout its length. The supports are on the same plane.
 

eq-parallel-forces-tripod.gif
  1. Find the reaction at A.
    A. 900 N
    B. 800 N
    C. 1400 N
    D. 2400 N
     
  2. Find the reaction at B.
    A. 900 N
    B. 800 N
    C. 1400 N
    D. 2400 N
     
  3. Find the reaction at C.
    A. 900 N
    B. 800 N
    C. 1400 N
    D. 2400 N
     
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