Dr. L. (the rectangle) stands on one end of a boat and he is carrying Kepler (the oval). The system is initially at rest. The boat is mass 12M, Dr. L. is 3M and Kepler is mass M. The boat is a total length of 2L and its mass its evenly distributed. The boat can move without friction on the surface of the water.
B.) (4pts) Kepler sticks to the left edge of the boat and comes to a stop. Where is the center of mass of the system? Your answer should be in terms of L only.