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OpenStudy (anonymous):

A subway train starts from rest and accelerates at a rate of 2.0 m/s^2 for 10s. It runs at a constant speed for 30s, and then slows down at a rate of -3.0 m/s^2. How long does it take the train to stop once it starts slowing down, and what is the total displacement of the train during its entire journey?

OpenStudy (loser66):

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