Question

The use of the D' Alembert's principle is for _______________

• A. determining the stresses in the truss
• B. stability of floating bodies
• C. reduction of problems of dynamics to equivalent statics problem
• D. design of safe structures

Answer 1

Answer:

C. reduction of problems of dynamics to equivalent statics problem

D'Alembert's principle states that the sum of the differences between the forces acting on a system and the time derivatives of the momenta of the system, projected onto any virtual displacement consistent with the constraints of the system, is zero. In practical terms, it's used to reduce problems in dynamics to equivalent static problems.