You are in charge of installing a small food-service elevator (called a dumbwaiterin the food industry) in a campus cafeteria. The motor raises and lowers the 35 kg dumbwaiter. It moves at a speed of 0.35 m/s, without accelerating (except for a brief initial period, which we can neglect, just after the motor is turned on). Electric motors typically have an efficiency of 78%. If you purchase a motor with an efficiency of 78%, what minimum power rating should the motor have? Ignore friction.

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