Why is it obviously wrong (other than you didn't specify the units)?togo said:
The section method is a technique used to determine the internal forces (tension or compression) in each member of a truss. It involves making a cut through the truss at a specific joint and analyzing the equilibrium of the resulting section.
The section to cut is typically chosen at a joint where the number of unknown forces is equal to the number of available equilibrium equations. This will result in a system of equations that can be solved to determine the forces in each member.
Yes, the section method can be used for any type of truss, including simple trusses, compound trusses, and complex trusses. However, the number of sections and equations needed may vary depending on the complexity of the truss.
The section method assumes that the truss is in a state of static equilibrium, meaning that the sum of all forces acting on the truss is equal to zero. It also assumes that all members of the truss are connected by frictionless pins or hinges and that the weight of the truss is negligible.
The section method may not be accurate if the truss is subject to dynamic loading or if there are deformations in the truss members. It also assumes that the joints of the truss are rigid and do not rotate, which may not be the case in certain situations. In these cases, other methods such as the method of joints or method of sections may be more suitable for analyzing forces in truss members.