Question

please short summarized answer 5minutes

How many zero-force members are there in the truss shown? JB is rope. 3m 3m + Зm 3m А B с D 4m - 4 kN H G Select one: a. 3 b. 4 C. 2 d.5

Answer 1

* Solution 2 * Support Reactions + EMI = 0 2x 127 5x8+3x6+2x4 2xy - Ayx16=0 Ay = 5.625 KN s frco Arco Methods of Joints > By inspech me, members BN, INC, DO, oc, HI, LE and sa are zero force members Method of sections G+ E Mmzo

* Question 2 FCD XY - 5.625x4 co FCD = 5.625KN (D G+EMA = 0 fcm x 4 - 2xy = 0 foM = 2 KN (T) FB CEO V2KN Ay = 5:25 KN Fuk K 45 4m kamit 3 KN 2KN -6.375KN 8

Support Reachions> GEMA=0 Ty (16)- 2012) - 3(10)-508)-2(4)=0 = 6.375KN Ty of Toints - By Inspection BN, NC, Do, oC, HT LE and JG are zero force members Method of sections GEMAC=0 3x2 +6.375x4 - FEFXYCO FEF= 7.875 -7.88 KN (T) G+EME=0 6.375 (8) 2(4)-3(2) Fuk (420 fLk=9.25KN (C) -

+ 1 Efy = 0 6.375-3-2-FEDS in 45=0 FED = 1.94 KN (T) * Answer a->Y memberes no. 1 * * Question Cf, DF ,IH → Zwo members Arswer & 3 members * Note> " If at a point /pin/joint three members are 2 are collinear then the force in the 3rd mender. will be Cof no load at that joint), If at a joint hoo members are meeting & they callinear then the force in the both megbess If there is no load or reactions at that point. 2 arce non-co are a gero

g Solution 1* D fro Yo F 4KN # ç