This structural connection is subjected to the 1 600N force

This structural connection is subjected to the 1, 600-N force. Replace this force by an equivalent force and couple acting at the center of the bolt group, O. F = (1280 i + 960 j) N, M = (-3.20 i + 7.20 j) N middot m F = (1280 i + 960 j) N, M = 48kN middot m F = (-1280 i - 960 j) N, M = (-3.20 i - 7.20 j) N middot m F = (-1280 i - 960 j)N, M = -48 k N middot m

Solution

option b is the correct answer because moment =force * perpendicular distance so force is acting towards left side direction M=-1600*30=-48 KN-M.