Question
A block and tackle system consisting of 5pulleys are used to raise a load of 400N through a height of 10m, if the work done against friction is 100joules.
1.calculate the work done by effort.
2.Calculate the efficiency of the system.
1.calculate the work done by effort.
2.Calculate the efficiency of the system.
Answers
work output = 400 Newtons * 10 meters = 4,000 Joules
work input = 4,000 + 100 = 4,100 Joules
efficiency = 100 (4000/4100) = 97.6%
work input = 4,000 + 100 = 4,100 Joules
efficiency = 100 (4000/4100) = 97.6%
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