A 65-kg lumberjack stands at one end of a 393-kg floating log, as shown in the figure. Both the log and the lumberjack are at rest initially.

A 65-kg lumberjack stands at one end of a 393-kg floating log, as shown in the figure. Both the log and the lumberjack are at rest initially. If the lumberjack now trots toward the other end of the log with a speed of 2.7 m/s relative to the log, what is the lumberjack's speed relative to the shore? Ignore friction between the log and the water. If the mass of the log had been greater, would the lumberjack's speed relative to the shore be greater than, less than, or the same?