QUESTION 9 What are the two major methods for solving trusses O Methods of Joint

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QUESTION 9 What are the two major methods for solving trusses O Methods of Joints and Components O Methods of sections and moments O Methods of joints and sections O Mothods of triangles and reactions QUESTION 10 Which of the following statements is WRONG O Components of the frames can be two-force members or multiple force members (e.g. can be under bending) O The extra force in a multiple force member is the transverse load or just the weight of the member 0 The advantage of method of sections is that not all points have to be analyzed and members far away from support can be quickly analyzed In the method of sections, no more than two web members may be sectioned. Click Save and Submit to save and submit. Cick Save All Answers to save all answers

Explanation / Answer

#9:

The forces in the truss members are solved using the methods of joints and sections.

The forces in the trusses are always axial forces as the joints are all pinned. Hence, we need not calculate components (option-1 is wrong) or moments (option-2 is wrong). As more than three members can branch from a joint, option-4 is wrong (method of trinagles is used only for three concurrent members).

#10:

Option-4 is wrong.(the method of sections, no more than two web members may be sectioned.) More than two members can be connected at a joint.

All other options are correct.

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