Question

The force in member CF is

• A. $60\sqrt{2}\text{(compression)}$
• B. $60\text{(Tension)}$
• C. $60\sqrt{2}\text{(Tension)}$
• D. $60\text{(compression)}$

Answer 1

The correct option is C $60\sqrt{2}\text{(Tension)}$



Due to symmetry force in member CF and FE are equal
$F_{CF}=F_{FE}$
@ joint 'C'
$\Sigma V=0$
$F_{CF}Sin{45}^o=60$
$F_{CF}=60\sqrt{2}\left(Tension\right)$