# physics

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A flock of ducks is trying to migrate south for the winter, but they keep being blown off course by a wind blowing from the west at 11{\rm m/s} . A wise elder duck finally realizes that the solution is to fly at an angle to the wind.If the ducks can fly at 17{\rm m/s} relative to the air, in what direction should they head in order to move directly south?

• physics -

At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.80{\rm m}/{\rm s}^{2} . At the same instant, a truck, traveling with a constant speed of 14.8{\rm m}/{\rm s} , overtakes and passes the automobile.

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