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container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one
floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s.
What is the efficiency of the motorized conveyor system?

  • Physics -

    energy output= 250g*2.4
    energy input= 450*45s

    efficiency= output/input

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