Two identical 0.13 kg blocks (labeled 1 and 2) are initially at rest on a nearly frictionless surface, connected by an unstretched spring, where x2 = 0.06 m. Then a constant force of 9 N to the right is applied to block 2, and at a later time the blocks are in the new positions, where x1 = 0.01 m and x3 = 0.1 m. At this final time, the system is moving to the right and also vibrating, and the spring is stretched.
What is the initial location of the center of mass of the real system?
What is the final location of the center of mass of the real system?
How far did the center of mass of the real system move?