The condition of equilibrium for any system of forces in a plane is____________________?

A. that polygon of forces must close

B. that resultant couple must be zero

C. both (A) and (B)

D. none of the above

Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.

Discuss the answer or suggest a sourced correction
Thank you for contributing.
Your comment was submitted and will appear after editorial review.

Your email is used only for moderation and is never displayed. Spam, copied material and fabricated endorsements are rejected.