Extracted text: The two bars, pinned together at B, are supported by a frictionless surface at A and built-in support at C. Determine the internal moment acting on section 1. + 0.6 m - 0.6 m →► 0.6 m →– 0.6 m → 900 N/m Av 50° B A 162 N.m B 126 N.m c) 261 N m D 612 N.m