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A train slows down at a constant rate as it rounds a sharp circular horizontal turn. Its initial speed is not known. It takes 18.1 s to slow down from 80 km/h to 33 km/h. The radius of the curve is 163 m. As the train goes around the turn, what is the magnitude of the tangential component of the acceleration? Answer in units of m/s2 Then At the moment the train’s speed is 45 km/h, what is the magnitude of the total accelera- tion? Answer in units of m/s2

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