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Imagine that you are working as a roller coaster designer. You want to build a record-breaking coaster that goes 70 m/s at the bottom f

Imagine that you are working as a roller coaster designer. You want to build a record-breaking coaster that goes 70 m/s at the bottom f the first hill. You estimate the efficiency of the tracks and cars you are using is 90%. How high must the first hill be?

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