1. (T/F) A two-force member has forces equal in magnitude and opposite in direction, acting along the same line of action.

2. (T/F) For moment equilibrium to be satisfied, three forces acting on a member must be concurrent or parallel.

3. (T/F) The Method of Joints is usually easiest to use when solving for all member forces in a truss.

4. The fundamental principle behind Method of Joints is

a. Newton’s 3rd Law of motion.

b. Equilibrium: if the whole system is in equilibrium, then so is any part of the system.

c. Moments: every force can be represented by a moment equal to force times distance, which simplifies truss analysis.

d. Statical determinacy: we can determine the force carried by any member if we know the reactions caused by the loads.

e. None of the above

5. (T/F) We denote truss members in compression and tension with vectors pointing into and away from their connection joints, respectively.

6-10. Fill in the blank on the right with the best choice.

a. Truss l l More supports than necessary to hold the body in equilibriumb. Reactions l l Slender members joined together at their end pointsc. Method of Joints l l A consequence of restricted motiond. Redundant constraints l l Isolate a pin connection and apply equilibrium equations to

f find connected member forces.