Question $2$: $(15$ Points$)$

In the assembly shown neglect the weight of the bar OABC and find the reactions at fixed support $O$ due to the action of the forces shown.

Answers: $R_o=-350i+100j-175k1b{M}_0=-7,600i-3,150j+6,450klb-in$

Question $3$: $(15$ Points$)$

In the truss structure shown, use method of section to find