Physics, 17.02.2021 01:40 jackson5637

d efficiency of a machine is 75percent .if did machine raises a load of 150kg through a vertical. height of 20cm, cap d workdone by d labourers using d machine (take g=10m/s^)

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d efficiency of a machine is 75percent .if did machine raises a load of 150kg through a vertical. he...