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A typical running track is an oval with 74-m -diameter half circles at each end. A runner going once around the track covers a distance

A typical running track is an oval with 74-m -diameter half circles at each end. A runner going once around the track covers a distance of 400 m . Suppose a runner, moving at a constant speed, goes once around the track in 1 min 40 s. What is her centripetal acceleration during the turn at each end of the track? Express your answer with the appropriate units.




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