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Statics is a course aimed at developing in students the concepts and skills related to the analysis and prediction of conditions of bodies under the action of balanced force systems. At a number of institutions, learning the traditional approach using force and moment equilibrium equations is followed by learning the energy approach using the virtual work method to enrich the learning of students. The transition from the traditional approach to the energy approach requires learning several related key concepts and strategy. Among others, compatible virtual displacement is a key concept, which is compatible with what is required in the virtual work method but is not commonly recognized and emphasized. The virtual work method is initially not easy to learn for many people. It is surmountable when one understands the following: (a) the proper steps and strategy in the method, (b) the displacement center, (c) some basic geometry, and (d ) the radian measure formula to compute virtual displacements. For learning and pedagogical purposes, this paper includes seven examples with various levels of challenge.

Learning The Virtual Work Method In Statics: What Is A Compatible Virtual Displacement?