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2. Take the example in class for when a fan attached to the sailboat fails to move
the boat forward. The sail is removed but the fan keeps running. Will the boat
move then? Why or why not? If so, which way will the boat move?

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The air blown by the fan will exert a force on the boat in the opposite direction but the air will exert a force in the opposite direction on the sail as a result the boat will not move. Hence due to Newton's third law, the boat with a sail and fan will not move.

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