The sketch shows a pin jointed truss, loaded with a single force P as shown. (a)

Question

The sketch shows a pin jointed

truss, loaded with a single force

P as shown.

(a) Identify all zero-force members.

(b) If the force in member GH is 0.6 kN

in compression. and the force in member

BC is 4.8 kN in tension. Calculate the

values of P and the angle @(alpa as shown in diagram) (. Hint: use a

section that cuts membcn BC. CF. CG

and GH.

Trigonometric identities:

sin(?+-?)=sin(?)cos(?)+-cos(?)sin(?)

cos(?+-?)=cos(?)cos(?)+-sin(?)sin(?)

The Answers are (a) Zero force members are: BF,CG, and DH.

(b) P=3.91KN and alpha = 40.60 degrees

Explanation / Answer

answer will be 'B;

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