5.5.15
On three vertical rods 1, 2 and 3, a horizontal rectangular platform 4 with sizes OA = 1.5AV and weight G = 1 kN is hinged. At point D, the spring 5 presses against the platform with a force of Q = 0.5 kN. Determine in kN the reaction in rod 2. (Answer 0.5)