The plane truss has hinge supports at P and W and is subjected to the horizontal forces as shown in the figure (not drawn to the scale).

Representing the tensile force with '+' sign and the compressive force with '-' sign, the force in member XW (in kN, round off to the nearest integer), is______.
-30

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Solution

The correct option is A -30

$\sum M_{Q} = 0$
$F_{X W} \times 4 + 10 \times 4 + 10 \times 8 = 0$
$F_{X W} = - \frac{120}{4} = - 30 k N$

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The correct option is A -30 ∑MQ=0 FXW×4+10×4+10×8=0 FXW=−1204=−30 kN

The correct option is A -30

$\sum M_{Q} = 0$
$F_{X W} \times 4 + 10 \times 4 + 10 \times 8 = 0$
$F_{X W} = - \frac{120}{4} = - 30 k N$