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Q: If in a planar system, only 2 rection forces are acting, then the system is:
  • A. Essentially unstable
  • B. Essentially stable
  • C. Can't say
  • D. None of these
Correct Answer: Option A - If number of reactions is less than 3 in any planar system, then the system is essentially unstable.
A. If number of reactions is less than 3 in any planar system, then the system is essentially unstable.

Explanations:

If number of reactions is less than 3 in any planar system, then the system is essentially unstable.