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You have to get a suitcase from the ground floor of a building to the top floor, a vertical displacement of 20 m. It takes

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You have to get a suitcase from the ground floor of a building to the top floor, a vertical displacement of 20 m. It takes 30 N to lift the suitcase. The work required to get the suitcase to the top floor is 600 J. You have two choices: i} Carry it up the flight of stairs yourself ii} Use an elevator Discuss which method is faster and power efficient

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