An elevator motor is used to lift 1000 N load to a height of 0.25 km. If the total amount of energy input is 1MJ, which one of the following pairs of values of energy wasted and efficiency are correct?

• A. Energy wasted = 500 kJ, Efficiency = 75 %
• B. Energy wasted = 750 kJ, Efficiency = 75 %
• C. Energy wasted = 750 kJ, Efficiency = 25 %
• D. Energy wasted = 500 kJ, Efficiency = 25 %