Question

Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. Consider the truss shown in (Figure 1) Suppose Uhal. F- 12 N For,- Value Units Submt Part B Determine the force in member CJ and state if this member is in tension or compression Express your answer to three significant figures and include the appropriate units. Enter negative valuc in the case of compression and positive value in the case of tension. Fes-Value Units Submit Figure 1 of 1 Part C Determine the force in member KJ and state if this member is in tension or compression. Expres your answer to three s gnificant gunas and includR the appropriate units Enter neaativa va ua ln the casa n comprass on and os t ve valua In the cas·at tens on 3 Im Fk-Value Units BCD Subru Request Answer 12m, 6e2

Answer 1

SOLUTION:-To solve the given problem we first find support reaction by applying condition of equilibrium.

Condition of equilibrium:-  $\sum F_{x}=0, \sum F_{y}=0,\sum M=0$

after calculation of support reaction we use method of section to find force in member CD,CJ,KJ.

method of section-In this problem we take section x-x which divided the given truss in two parts.by applying condition of equilibrium of left part we find force in member CD,CJ,KJ.

3 m Az ス. 12m, 6@2 m G) Figume L For equi i bium of entive huss

Takeng momen t aboet A e 61 30F3OX l2 30 KN 2. AD In tman ABL anBL AB 2. In tianyle Ac k

euatton 2 2. 2. 2 2. us!'), met d of Seckin to fend the ce in mambers CD, CT and KT Let sectionx-x be passed n Such a way ha civided e ss in-to 9 m) Fcz Sin Cj β 2m

Takeiy moment abt 3 3 m) C2m D

3 CJ J13 Takig moment abaut A FK2 tFX4 _ FCT çinf X 4 t fe.csf x о 0 3 1.3 Here positive çtan unti cate that remix-·CI Is un tenseon cos θ

COS AJ 4S 468 COSE KJ Jy5 Hes ncaive sin indicate th! mem pt A pil B pant c KN Fcj +21633 kN KJ -53 6656 KN Ans