Identify the correct statements about the method of nodes for analyzing trusses:
a. The method of nodes can only be used if all forces acting on a node are known.
b. The method of nodes can be used to determine the forces in each element of a truss.
c. Elements of zero force can be identified by analyzing the free body diagram of each node.
d. The method of nodes can only be used for trusses with up to three unknown forces per node.
b. The method of nodes can be used to determine the forces in each element of a truss.
c. Elements of zero force can be identified by analyzing the free body diagram of each node.