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Q: In planar system, X parts/members are there with Y no. of forces. If Y > 3X, the system is–
  • A. Statically indeterminate
  • B. Statically determinate
  • C. Can't say
  • D. Depends on other conditions
Correct Answer: Option A - No. of members = X No. of forces = Y Y = 3X determinate Y < 3X unstable if Y > 3X then system is statically indeterminate.
A. No. of members = X No. of forces = Y Y = 3X determinate Y < 3X unstable if Y > 3X then system is statically indeterminate.

Explanations:

No. of members = X No. of forces = Y Y = 3X determinate Y < 3X unstable if Y > 3X then system is statically indeterminate.