Statics - Test 2 review

A review for Test 2.
3D moment about a point
3D moment about an axis
2D beam equilibrium
Trusses - Method of Joints
Trusses - Method of Sections
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[Claytonator]

For the second problem wouldn't Rbd= 10i + 10k since the 10 is toward x on the x-axis? Otherwise the 10i in the force would need to be negative too?

[tpfnebf]

How did you do your math in the first one. The cross multiplication results do not make sense