Solution of task 16.2.9 from the collection of Kepe OE

Solution of task 16.2.9 from the collection of Kepe OE

16.2.9
On a smooth floor and a smooth wall at an angle φ = 60 °, the supporting rod with a mass m = 3 kg begins to slide with the acceleration of the center of mass a = i - 5,5j. Determine the value of the normal reaction at point A. (Answer 3)