A gymnast having a mass of 80 kg holds the two rings with his arms down in the position...

A gymnast having a mass of 80 kg holds the two rings with his arms down in the position shown as he swings downward. His center of mass is located at point G₁. When he is at the lowest position of his swing, his velocity is At this position he suddenly lets his arms come up, shifting his center of mass to position G₂. Determine his new velocity in the upswing and the angle θ to which he swings before momentarily coming to rest. Treat his body as a particle.