# Physics

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At a city park, a person throws some bread into a duck pond. Two 4.00-kg ducks and a 9.00-kg goose paddle rapidly toward the bread, as shown in our sketch (Intro 1 figure) . If the ducks swim at 1.10 m/s, and the goose swims with a speed of 1.30 m/s, the total momentum of the three birds is 8.52 kg\ m/s at 58.9 above the positive x axis.

Find the total momentum of the birds if the goose reverses direction

below the positive x axis

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