Question
A block and tackle system of 5 pulleys is used to raise a load of 500N steadily through a height of 20m.The work done against friction is then 2000J.Calculate the efficiency of the system.
Answers
bobpursley
work performed=500*20*9.8 N
friction=2000
efficiencey= work performed/(workpreformed+friction)
friction=2000
efficiencey= work performed/(workpreformed+friction)
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