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You've always wondered about the acceleration of the elevators in the 101 story-tall Empire State Building. One day, while visiting New York, you take your bathroom scale into the elevator and stand on them. The scales read 150{ lb} as the door closes. The reading varies between 120{ lb} and 170{ lb} as the elevator travels 101 floors. What is the magnitude of the acceleration as the elevator starts upward? What is the magnitude of the acceleration as the elevator brakes to a stop?

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