It sounds like you are describing a setup where you have a solid object (object A), a ball (object B), and a ring attached to the ball. If a rod is inserted through the ring and the ball is rapidly pulled down, the force of the movement will be transmitted through the ring to object A, causing object A to move as well. The amount of force transmitted will depend on the mass of the objects, the acceleration of the movement, and the strength of the materials used. It is also possible that the movement of object A could cause the rod to rotate or twist, depending on the shape and size of the rod and the properties of the materials it is made of.