Abstract—In this work we analyze the controllability and observability properties of several interconnection configurations such as the chain topology and cyclic topology as well as combinations of these two topologies. A leader/follower control strategy is proposed to control the center of mass of the multiple agent system. It is shown that the trajectory tracking for a multi-agent system converges to the constant input reference given only to the leader. Also, it is shown that choosing an appropriated gain, the agents achieve consensus for constant input reference.