Each of the sliders A and B has a mass of 2 kg and moves with negligible friction in its...

Each of the sliders A and B has a mass of 2 kg and moves with negligible friction in its respective guide, with y being in the vertical direction. A 20-N horizontal force is applied to the midpoint of the connecting link of negligible mass, and the assembly is released from rest with θ = 0. Calculate the velocity v_A with which A strikes the horizontal guide when θ = 90°.