wo identical containers of sugar are connected by a cord that passes over a frictionless pulley. the cord and pulley have negligible mass, each container and its sugar together have a mass of 500 g, the centers of the containers are separated by 50 mm, and the containers are held fixed at the same height. what is the horizontal distance between the center of container 1 and the center of mass of the two-container system (a) initially and (b) after 20 g of sugar is transferred from container 1 to container 2? after the transfer and after the containers are released, (c) in what direction and (d) at what