Question

If two forces acting at a joint are not along the straight line, then for the equilibrium of the joint

• A. one of the forces must be zero
• B. each force must be zero
• C. forces must be equal and of the same sign
• D. forces must be equal in magnitude but opposite in sign

Hint:

This is a fundamental rule used in truss analysis:
If a joint has only two non-collinear members and no external load acts on it, both members are zero-force members ($F_1 = F_2 = 0$).

Answer 1

The Correct Option is B