Question

Problem 4 Identify the zero-force members in each truss. 30° 30° 30° 30° 2 m 2 m- 600 N

Answer 1

- wmww Answer conditions to zero force members 1. If three bars meet at a joint and no external forces acting on joint and two of the three bars are collinear then the third bar is zero force member. 2. If two bars meat at a joint and no external force is acting on it, then two bars are Zero-force members.

→ Now Based on est condition, BF and BD are Zero-force members. ie CUB AC Here, AF and FE are collinear, so Bf is a Zero- force member. Here, ED and co are collinear, so BD is a zero force member. are not And remaining all members Zero- force members. Zero-force members = BF and BD are Ang Good Luck.