Truss cannot be acted upon three force members. Because the truss in a...
The singular plane of the truss doesn’t mean that the trusses cannot be acted upon the three force system. They can be acted upon the three force system, possibility is that the forces might not be collinear or might be parallel to each other. But point is the trusses can be acted on the three force members too, still conditions need to specific.
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Truss cannot be acted upon three force members. Because the truss in a...
The statement in question is "Truss cannot be acted upon by three-force members because the truss is in a single plane." We are asked to determine the correctness of each part of the statement.
First Part: "Truss cannot be acted upon by three-force members."
A truss is a structural system composed of interconnected members. Each member of a truss can either be a two-force member or a three-force member. A two-force member is a structural element that only carries forces along its length and has no moment or torque. On the other hand, a three-force member is a structural element that carries forces along its length as well as a moment or torque.
Therefore, the first part of the statement is false. Trusses can indeed be acted upon by three-force members.
Second Part: "The truss is in a single plane."
A truss is typically designed and constructed in a single plane. This means that all the members and joints of the truss lie in a two-dimensional plane. This simplifies the analysis and design of the truss since it can be treated as a planar structure.
Therefore, the second part of the statement is true. Trusses are commonly designed and analyzed in a single plane.
Conclusion:
Based on the analysis above, we can conclude that the first part of the statement is false, while the second part of the statement is true. Therefore, the correct answer is option A.