Question $1$

$33$ pts

The truss structure in the figure is supported by a hinge at A and a roller at $Q.$ When $F_0=7000lb,$

$($a$)$ list zero force members,

$($b$)$ determine reactive forces at A and Q $,$ and

$($c$)$ find member forces in ED$,$ HM$,$ MN$,$ and HN $,$ and state if they are in tension or compression.

Note: All numbers should be rounded to $2$ decimal places. If the method of sections was NOT used, there will be a $30\%$ deduction.

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