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

Question

i) the mechanical advantage of the system
ii) the weight lifted
iii) the work done by the effort

Answer 1

Answer

Answer 2

Please someone help

Answer 3

57
6897
6

Answer 4

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