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Q. 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 at first. If the lumberjack now trots toward the other end of the log with a speed of 2.70 m/s relative to the log, what is the lumberjack's speed relative to the shore? Neglect friction between the log and the water.

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