A cable and pulley system at

is used to support the rigid bar

as indicated below. Bar

is pin$-$connected at

$.$ A box with weight

hangs from point

$.$

Consider

and

$.$

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W $=4$; $\%$ kN

a $=5$; $\%$ m

b $=5$; $\%$ m

d $=13$; $\%$ mm

theta $=54$; $\%$ degrees