question: Why do hydraulic elevators use more energy ?
answer: the pump works against gravity to push the car and its passengers upwards ; this energy is lost when the car descends on its own weight
turker_answer: Hydraulic elevators use more energy because the pump works against gravity to push the car and its passengers upwards ; this energy is lost when the car descends on its own weight .
rule-based: Hydraulic elevators use more energy because the pump works against gravity to push the car and its passengers upwards ; this energy is lost when the car descends on its own weight .