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A 643-kg elevator starts from rest and moves upward for 3.80 s with constant acceleration until...

A 643-kg elevator starts from rest and moves upward for 3.80 s with constant acceleration until it reaches its cruising speed, 1.69 m/s. (a) What is the average power of the elevator motor during this period? . hp (b) How does this amount of power compare with its power during an upward trip with constant speed? (Give the power during an upward trip with constant speed.) hp

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