A boy in a wagon is moving at 31 ms east when another boy, Ask an Expert

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A boy in a wagon is moving at 3.1 m/s east when another boy begins pulling on the wagon in the direction opposite to its motion at 1.25 m/s^2.

(a) How long does it take to give the wagon a velocity of 7.4 m/s west?

(b) How far from the starting point is the wagon at that time?

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