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April 23, 2014

Homework Help: Honors Physics

Posted by Elizabeth on Wednesday, February 22, 2012 at 7:02pm.

A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 290 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.1 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Neglect any friction and resistance between the logs and the water.

(a) What is the velocity of the first log just before the lumberjack jumps off?

(b) Determine the velocity of the second log if the lumberjack comes to rest on it.

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