Chapter 14.2, Problem 14.49P

Three identical small spheres, each of weight 2 Ib, can slide freely on a horizontal frictionless surface. Spheres B and C are connected by a light rod and are at rest in the position shown when sphere B is struck squarely by sphere A which is moving to the right with a velocity $v_0=\left(8\text{ft/s}\right)\text{i}$ .Knowing that $\theta =45°$ and that the velocities of spheres A and B immediately after the impact are $v_A=0$ and $v_0=\left(6\text{ft/s}\right)\text{i+}{\left(v_g\right)}_y\text{j}$ , determine ${\left(v_g\right)}_y$ and the velocity of C immediately after impact.