Question

an effort of 250N is applied to a pulley system consisting of two fixed and two movable pulleys to lift a load to a height of 20m. if the efficiency of the system is 60% and the work done in overcoming friction is 3000j, calculate
i) the mechanical advantage of the system
ii) the weight lifted
iii) the work done by the effort

Answers

Answer
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57
6897
6
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