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Q81. A machine which has an efficiency of 80% raises a load of 50N through a vertical height of 10m. The work input to the machine is:

Physics — Work, Power and Energy — Question 81 of 238

A. 400 J
B. 500 J
C. 800 J
D. 625 J

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A machine which has an efficiency of 80% raises a load ... | Physics MCQ #81 | Examora | Examora