A man sits in the back of a canoe in still water. He then moves to the front of the canoe and sits there. Afterwards the canoe:
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This involves conservation of momentum. The man-canoe system has zero initial momentum. When the man moves forward, the canoe must move backward to keep the total momentum at zero. After he stops, all motion ceases.
Let be the man's mass, the canoe's mass. The center of mass remains fixed. The canoe moves backward while he walks. When he stops at the front, the canoe stops moving but is now rearward of its original position.
Final answer: is rearward of its original position and not moving