A 30-kg child stands at one end of a floating 20-kg canoe that is 5.0-m long and

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Question:

A 30-kg child stands at one end of a floating 20-kg canoe that is 5.0-m long and initially at rest in the water. The child then slowly walks to the other end of the canoe. How far does the canoe move in the water, assuming water friction is negligible?