8/15/2023 0 Comments Rigid body equilibrium 3d youtubeThis is not to say that it is impossible to find all reaction force on an over-constrained system, just that you will not learn how to find them in this course. For your convenience, watch my partially created playlist in STATICS (Your ONE-STOP CHANNEL or COURSE) which shall be completed when I can upload all the lec. In terms of force and moment equations, there are more unknowns than than equilibrium equations so they can’t all be determined. On the other hand, if there are more reaction components than degrees of freedom, the system is both over-constrainedand indeterminate. This means that we can determine no more than three unknown reaction components in two-dimensional systems and no more than six in three-dimensional systems.Īn indeterminate system with fewer reaction components than degrees of freedom is under-constrained and therefore unstable. Each equilibrium equation derives from a degree of freedom of the system, so there may be no more unknowns than degrees of freedom. In order for a system to be determinate the number of unknown force and moment reaction components must be less than or equal to the number of independent equations of equilibrium available. How can I decide if a problem is both stable and determinate, which makes it solvable statics?Ī static system is determinate if it is possible to find the unknown reactions using the methods of statics, that is, by using equilibrium equations, otherwise it is indeterminate.
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