A three pulley system has an efficiency of 75% Calculate:
А) МА
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A pulley system has 5 pulleys in all and 75prcnt efficient.Calculate
MA
Effort required to lift a load of 875N
Resistance due to movable parts of pulley system
Asked by lovemaan5500 | 1st Dec, 2017, 01:09: PM
Expert Answer:
M A equals n space x V R
N u m b e r space o f space p u l l e y s space equals space V R space equals 5
n equals 75 divided by 100
M A equals 75 over 100 x 5 equals 3.75
M A equals fraction numerator l o a d over denominator e f f o r t end fraction
e f f o r t equals fraction numerator 875 over denominator 3.75 end fraction equals 233.33 space
r e s i s tan c e equals space e f f o r t left parenthesis V R minus M A right parenthesis equals space 233.33 space left parenthesis 5 minus 3.75 right parenthesis equals 291.665 N