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A 60 kg man stands at the edge of a raft of mass 20 kg that is 10 meters long (the raft has a uniform density). The edge of the raft is against the...

A 60 kg man stands at the edge of a raft of mass
20 kg that is 10 meters long (the raft has a uniform
density). The edge of the raft is against the shore of the
lake. The man walks toward the shore, the entire length
of the raft. How far from the shore does the raft move?
[Hint: the center of mass should remain unchanged when
the man walks from A to B] [Answer: 8.0 m]

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