The principle of virtual work can be applied to elastic system by considering the virtual work of
- AInternal forces only
- BExternal forces only
- CInternal and external forcesCorrect
- DNone of the above
Solution
Concept
Virtual work
Formula
δWe = δWi
Step-by-step solution
1. External virtual work equals internal virtual work, so both are considered.
Explanation
External virtual work equals internal virtual work, so both are considered.
Why the other options are wrong
Considering only one is incomplete.
Correct answer: C) Internal and external forces