5.3.11
The force F || is applied to the frame ABCD; Oz and a pair of forces with moment M || Oh. Determine the modulus of the principal moment, taking the point A as the center of reduction, if the force F = 100 N, the moment of the pair M = 50 N • m, the size a = 1 m and the angle α = 60 °. (Answer 100)