Conservation of momentum.
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In Fig. 9-32a, a 5.1 kg dog stands on an 21 kg flatboat and is 6.1 m from the shore. He walks 2.1 m on the boat toward shore and then stops. Assuming there is no friction between the boat and the water, find how far the dog is then from the shore? (Hint: See Fig. 9-32b. The dog moves leftward; the boat moves rightward; but does the center of mass of the boat + dog system move?)
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<br>However, before you look at the solution let me suggest that you try to solve the problem using the following steps:
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<br>The center of mass of the dog-boat system does not change since there are no ...
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