### Compute the acceleration at the moment the train speed

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A train slows down as it rounds a sharp horizontal turn, going from 80.0 km/h to 58.0 km/h in the 13.0 s that it takes to round the bend. The radius of the curve is 180 m. Compute the acceleration at the moment the train speed reaches 58.0 km/h. Assume the train continues to slow down at this time at the same rate.

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