Problem $3(10$ points$)$:

Determine the forces in members $F,FB,$ and $AB$ of the truss and state if the members are in tension or compression. Yse method of seftinns

The support reactions are calculated as

$A_Y=15karr$

$A_4=0$

$D_1=18karr$

Solution:

Answers: $)$

$FFF=15kN(T)$

$F_N=15kN(m)$