All the joints are hinged

Question

Two steel truss members, AC and BC, each having cross sectional area of 100 mm², are subjected to a horizontal force F as shown in figure. All the joints are hinged.        

 

1. If F = 1kN, magnitude of the vertical reaction force developed at the point B in kN is

      (a) 0.63                                                               (b) 0.32

      (c) 1.26                                                               (d) 1.46

2 . The maximum force F in kN that can be applied at C such that the axial stress in any of the truss members DOES NOT exceed 100MPa is

      (a) 8.17                                                               (b) 11.15

      (c) 14.14                                                             (d) 22.30

Answer 1

1. Force at the point B

2. Force at point C