virtual work
Quick Summary
The principle of virtual work is a concept in classical mechanics used to solve problems involving systems in equilibrium. It states that for a system in equilibrium, any infinitesimal virtual displacement consistent with the constraints requires no work. A virtual displacement is an instantaneous change in coordinates, not a real displacement that takes time.1
This principle is particularly useful when dealing with complex systems or constraints where traditional methods of solving Newton's laws become intractable. It simplifies the analysis by focusing on the balance of forces and displacements without needing to consider the detailed dynamics of motion.1
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