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A lumberjack (mass = 98 kilogram) is standing at rest on one end of a floating log (mass = 245 kilogram) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.8 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Ignore any friction and resistance between the water and the logs.
(a) Determine the velocity of the first log just before the lumberjack jumps off? (Indicate the direction of the velocity by the sign of your answers.)
(b) Find the velocity of the second log if the lumberjack comes to rest on it.
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